Nosy Nellie

A guide to finding all 66 chests in the High Rift with pictures and a short text description as well as the obelisk. The game will randomly pick 5 of the 10 levels possible for each of the floors except the break rooms (obviously) and the 3rd, 7th, and 11th levels which are just 1 level with 3 obelisks and 2 chests to find and are always the same. This covers the 10 levels possible on floors 1, 2, 5, 6, 9 and 10 as well as the singular floors.

I used a couple youtube videos for references instead of taking my own screenshots, and they also clued me in to where a few of the tricky ones could be found so they definitely deserve some credit of contribution, so I will link the videos below (check 'em out if you're still stuck)

Floor 1 Levels

CONNECT 4
To your right is platforms and crystal wall, use them to reach chest (#1).
Up, to left side of this wall is one of the four red buttons. Forward, to the middle in the structure is a red button and crystal wall. Coming out the left side door there's a break in the wall/gate on the right with platforms to reach chest (#2).
Again just over the wall to the left is another red button. Going straight forward and behind the cornerwall is the last button to open the door in the middle, which leads to obelisk.

BLOSSOMS & BUTTONS
Run forward, make sure to get the blue switch on the right and yellow switch on the left before defeating the blossoms to open the purple enemy door. Down the stairs there's buttons to hop on to get to the other side. Use green ones to avoid damage. In the middle, on the right, there's a tiny opening to go through and grab a chest (#1).
Use the green buttons the rest of the way to the obelisk room.
To the right up the stairs leads to a chest (#2).

DARKNESS
Exit the starting area forward, locate red button to the left (out in the open), 360, continue down the hall. On the left there is an opening in the wall in the corner for the chest room (#1).
Back out, towards the right there is a purple enemy unlock door. Just past it you can see the glow of the red chest door, down the hall heading towards it you can take a left to press the second red button to open that door, 360 and go to the now open door. There is chest (#2).
Kill all enemies in the vicinity, to unlock purple enemy door and get obelisk (all lights will turn on)

MINESWEEP
Starting out you will see a bridge in front of you crossing over sand and leading to a locked green door with the obelisk. To the left, kill blossom. Throw bombs at sand under the rift crystals on the wall until you find a green button. Across and forward on the wall under the bridge is another green buttton. Continue along the bridge wall, toward the back/starting area but still in the sand throwing bombs to reach chest (#1).
Cross the bridge to the right area with sand.Again, throw bombs below the rift crystals on the wall towards the far end to reveal another green button. Turn around 360 and towards the back of the sand pit throw more bombs to reveal the last green button and open the obelisk door.
Behind the first sand pit to the left (to your right now, from obelisk room) there is a hole in the wall that leads out to a platform holding chest (#2).

RGB BUTTONS & DOORS
Walk forward, follow the hall to the yellow button. Take a right and hop up the staircase to reach chest (#1).
Hop down and locate newly opened yellow door directly ahead of you (back towards the start). Press red button and 360 to see a bookcase on the wall. Open it, it's a secret door, to a room with chest (#2).
Exit here, the red button opened a door in front of you, hit the blue button and run to the left, the open doorway. Ahead you will see obelisk door open.

GREEN BUTTON CASTLE
Run up the stairs to the left and 360 to see a hall leading to a green button. Turn around again, and go directly forward to the back wall of the level with the rift crystals on it. Hop up the stone and go right into the wooden room with green roof containing a chest (#1).
Exit this room and go to the left (originally the right) that has a hall leading to another green button. Around the back of this area there is a platform with a chest (#2).
Turn around again and you should see the green door to the obelisk now open.

RING OF FIREBALLS
Begin by running to the right towards the circling fireballs, dodge them and hit the green button. To the right of the green button there is a sandy area, dig it up to reveal a chest (#1).
Now go to the big building, defeat the mummies inside to open the purple enemy unlock door which reveals obelisk.
Exit the building and jump/rocket/build to the roof and to the right there is chest (#2).

RUINS
The torches guide you for most of it. Begin to the right, hop up and continue all the way to the back, there will be a hole in the wall to go on the platform around and grab the chest (#1).
Back through the wall directly ahead the torches lead to the open obelisk.
Spin around, jump down and go left and forward, you'll come to a break in the ground to hop over, and in the back corner there is chest (#2).

ROCKETS
There's rockets in the chest when you first spawn that make this level easier. You can also just use blocks to build up. Follow the platform until you come to a large island with a monster spawner. Destroy it. There's a floating tower to the right, get to the top of it for chest (#1).
Back to the platforms, up to the drawbridge there is another spawner to destroy. To the back right (where the floating square tower was with previous chest) there is an area of crystals and if you 360 from there, you'll see a platform holding chest (#2).
Continue up the platform to reach an open purple unlock door assuming you killed the spawners, which leads to obelisk.

LIGHT SLIME HOUSE
Start by jumping up and right immediately on top of the house there is chest (#1).
360, jump across the wood beams to the left, look on the outer areas of the house, there is a platform with chest (#2) on it.
Go back into the house, locate the stairs that go under the house to a basement type area with obelisk. Once you get it, light slimes will summon but you can just teleport to landing pad.

Floor 2 Levels

DUALITY
Hop on platforms until you reach tower with an alcove holding chest (#1).
Back on the platforms, stay right, leads to the structure with obelisk.
Go out, directly on top of the structure for a chest (#2).

SPIDER CHURCH
Run around to left of the first part of small building when you spawn in. Platform leads to a blue button. Go back to main area and follow the pathway around to the wall with crystals. There is a small space to go into around the corner that leads into building, chest (#1).
Go back out, following the main path leads to a yellow button, to the left of that there's a platform around the back of this building to the other blue button. Back to the main path, you'll see the blue door to chest (#2) now open.
Just to the left is also a yellow door that has a room with the spider spawner that you must kill to open the purple enemy door to obelisk.
PLATFORMS
Run forward, kill the red sorcerer skeleton (you may also want to take out hounds, not required) to reveal some red platforms. Use a scroll of revelation to reveal white platforms to the area underneath the middle big platform area with chest (#1).
Go back to red platforms, hop up and over to the big middle platform, kill the red sorcerer on the way. There is a purple enemy door here, clear all enemies to open it and get the obelisk.
Take the red platforms to the right back down, another red sorcerer to clear. Just below him, you can drop down into an alcove below the platform that is holding chest (#2).

REVELATION
There's a chest with scrolls of revelations available if you need. Use a scroll. Go up, left at the fork. Up, right at fork. The platforms should be disappearing now, but you can jump down to the platform for a chest (#1).
Go back up and use a scroll, forward and to the left and you'll see the obelisk.
Jump back down, directly in front and to the left is the platform with chest (#2).

OASIS
Hop into water and defeat turtle enemies while going right. Take a right when first able to make a decision and continue going, you'll see a staircase on the right leading to chest (#1).
Back down stairs, defeat enemies, follow the right wall again. Behind the potion cases there's a green button. Continue through door, you'll reach an area with purple glow, continue straight until you reach a room with the green door that's now open. Go upstairs, there's a merman spawner to destroy to open the purple enemy door that is a shortcut to the starting area. Also opens the purple enemy unlock door to obelisk.
Going out back towards shortcut door but around the right side of the building, there's a platform and chest (#2).

AUTUMN
As soon as you spawn, go to the right and around the building to see a platform with chest (#1).
Back out to the spawner, there is a bridge over the swamp, part of it has darker blocks as opposed to wood/dirt. Directly below those either dig or throw bombs to reach chest (#2).
Follow the bridges along to building, where there's 4 white buttons. You must press them in the correct order to open the door to obelisk. From left to right the numbers are 1 to 4, you want to press 2, 4, 1, 3.

ELECTRICITY
Jump from platforms to main area with purple beams. The first beam to the left has a small area next to it that you can go through if you jump to the corner platform and go through the door when the beam flickers off to get a chest (#1).
Back out to main area, go out and hop up above where you just were in the brick hallway area. To the left around the corner is green button. Go down, directly across and hop up to bricks with a hall that leads left around a corner with a green button. 360, go towards the wall with the green door, but use the side of the wall to hop up to roof where there is chest (#2).
Drop down and go in green door where the obelisk is.

RED AND GREEN
Go forward towards green door, follow the hall, go through the hole in the wall directly ahead and around corner to reach a green button. Back out to main hall you'll see another hole in the wall with cactus, go out and around the platform holding chest (#1).
Back into the hall, there's a red button on the left wall. Continue until you have a hole in the wall there's a fork. To the right there's a green button. Go back out, take the left path which leads to open red door with chest (#2).
Back out to the middle of the main hall you will see the door now open to the obelisk.

DUNGEON
Go through the door, kill the hollow elves to open the purple enemy door ahead. At the back right corner, the room has a small wall opening with green button. Through the open enemy door to the right, throw bombs at the sand blocks to reveal a trap door to chest (#1).
Back up into that room there is also an open green door with chest (#2).
Go back to the main way, kill the hollow elves, snappers, and daring bones to open the purple enemy door with obelisk.

TOMB
Run towards right side of the structure with the green door. Around back, drop down to an alcove below the back platform to find chest (#1).
Hop back up to the second level of the structure, to either side is a green button between the sarcophagi. At the very top of the structure there is chest (#2) out in the open.
Drop back down to the bottom where the green door is now open for the obelisk.

Floor 3

Floor 5 Levels

SHROOM KEEP
Exit main area by left door. Behind the staircase is crystal wall and dirt patch on the floor. Dig the dirt to reach chest (#1).
The red button opens the gate to yellow button. Hop on platforms to right and upstairs, straight through door and upstairs to right again. Dodge projectiles to reach yellow button. Just behind last shooter on the left you can go through wall to reach chest (#2).
There's a door shortcut on the right to spawn where yellow obelisk door is now open.

GRAVEYARD
Go downstairs to main area, left is a room with red fallen soldier to defeat, behind him there in mineable concrete walls, panel on the right has chest (#1).
Back out around the hall you can see purple enemy door on right, and you'll meet another fallen soldier. In alcove in his corner with a skill, go in and you'll see white button. 360, continue hallway to fight another soldier and another alcove with white button in corner. Purple enemy door should now be open to obelisk.
Locate staircase to surface, building with white door is open with chest (#2).

ATLANTIS
Immediately right and under the purple obelisk unlock door, underwater, there's a secret staircase leading to chest (#1).
Back out to the right still underwater there is a semi walled area with chest (#2).
Up to platforms and structure in the back there's a yellow button. Exit, use platforms towards yellow door with obelisk on your left.

RGB BUTTONS PT II
Begin going left there's a blue button, just around the corner there's a platform to chest (#1).
Back to blue door that just opened, go down the hall to locate a red button. 360, down the hall and to the right you'll see now open red door. At the end of the room there is a picture frame of a person and red brick blocks that stand out from grey. Mine them to find chest (#2).
Up the stairs, right, yellow button on the right, you reach a room and face a white door. Go to the end of the room and out back right door, you'll see the yellow door now open. Inside, a white button, go back to the white door and there's obelisk.

RED STATUES
Run to left red statue, through the window there's a platform to yellow button. Back to main area, build/rocket directly up at the door where statues are to find chest (#1) on the roof.
Going in the door reveals red skeletons to defeat in order to unlock the purple enemy door and get obelisk.
Going back out and right immediately there's a door opened by the yellow button with chest (#2).

SPACE EYES
Jump down, defeat all enemies in the location while going up the stairs to the other structure. Press the blue button in the middle, then go to the back right and locate the platform to drop to which lets you in the alcove with a chest (#1).
Back to the middle pond a caster has been summoned, kill it and the little imps to open the purple enemy unlock door and get the obelisk.
Turn around 360, leaving to the right, there is a set of platforms leading to a dirt portion of the wall, mine it for chest (#2).

LIBRARY
Go to the end of the hall, take a left while dodging light projectiles. Keep going until the end of the hall where you must go left, then immediately right around the corner and in front of you should be a short bookcase. It's actually a secret bookcase, behind it is a chest (#1).
Back out and to the right at the end of the hall there is a blue button. Go back to the spawn of this area (you can die for quicker back), and you'll see the blue door now open with obelisk directly on your left.
Behind it there is minable concrete blocks, with a chest (#2) behind them.

DODGE
Follow hallway down, dodging blue projectiles. On your right you'll see white button, continue left down hall, there's a wall of crystals. Just past it, left in an alcove in the wall is another white button. Another wall of crystals, you reach big room with spinning pillars shooting blue projectiles. Avoid them while collecting 2 blue buttons on opposite corners of room. Next to one blue button there's an opening in the wall that leads to chest (#1).
Go through the open blue door to reach obelisk.
Just to the left is the open white door with chest (#2).

MINE
Go forward, drop down from the first pillar to bottom base where there's a red button. Go back up, defeat the elf mage to unlock purple enemy door. You'll reach another room with elf mage and purple enemy door. Follow the tracks right to reach a small opening to another red button. Back up to those tracks there's a minecart facing left with tracks going to wall, and on the wall is an alcove to chest (#1).
Back out, continuing straight through the center door, you reach the obelisk.
There's also an open red door to chest (#2).

3 CHESTS
The only level with 3 chests, one can be located by going up past torches, to wall of crystals, the second one/one on the right of the corner. You can use bombs to get crystals and dig down to find chest (#1).
Go back up past the light projectiles, up to the right is a purple enemy door opened by defeating the spores, which gives you obelisk.
Out, to the right, up the side to the back is a platform with a chest (#2).
Drop down to where the first place you went up after the light projectiles, just around the edge of the "staircase" is a platform with chest (#3).

Floor 6 Levels

FOUNTAIN
Begin by running back toward the wall behind you, and hop up the indentations to reach an alcove with chest (#1).
Down, the main area has pincers to defeat to unlock purple door. Down the hall, snappers to defeat to unlock purple door. You'll now be in an arena type area surrounded by purple energy. Destroy corroding bones and locate staircase down to obelisk.
Back upstairs, there's an alcove with yellow button. Use purple shortcut door to reach crystal wall next to yellow door with chest (#2).

YELLOW
Avoid the yellow pressure plates, go to back left corner of room for yellow button and up the wall and over to reach chest (#1).
Go through door on the left down broken hallway, make sure to push blue button. To the left of it, there's a hole in the wall with platforms to a yellow button. Return to plate area, right through blue and yellow doors to find chest (#2).
360 down broken hall to obelisk.

SWITCH
Start by going left where the red spider is, press red button. The lights on the structure tell you the key to opening the door. The yellow and green lights are off, so hit those switches to open door to obelisk.
Behind is a window with a platform outside leading to chest (#1).
Outside and left of the structure is more platforms leading to an alcove with chest (#2).

SHROOM POND
At the start, staircase to the left is dirt. Destroy it to reach red button. Upstairs, right, around the side is a platform to a green button. Running in right door leads to another red button and yellow button. Toggle white middle switch to open left door for another yellow button and green door to chest (#1).
Down to spawn, red door is now open with chest (#2).
An elf mage will spawn, remove it to open purple enemy door with obelisk.

FIREBALLS X2
Dodge the fireballs and hop to the end of the platforms. Behind the wall of the staircase, there is a platform holding a chest (#1).
Back up the staircase, into the area on the right there is a yellow button. Hop up to the right and dodge fireballs yet again on platforms. You reach the end where there's an open yellow door to the obelisk. The purple obelisk unlock door is now open.
You can hop up the side like a staircase and the chest (#2) is on the roof.

RED AND GREEN V2
Start by hopping along the platforms on the inner wall to the back area where you can see the red button to the right, and to the left leads to a room with a chest (#1).
Drop down to the middle to spawn many creatures to defeat to open the purple enemy unlock door. Up the stairs to the left is a green button. Up the stairs to the right is a hall to the obelisk and a purple obelisk unlock door opens for a shortcut.
Drop down in the middle just below the teleporter and the green door is now open which has the other red button to open the red door by the spawn holding a chest (#2).

LIT UP
Drop down and immediately turn around to see an alcove holding a chest (#1).
Go back out, dodging the light balls, either staircase leads down to an openable door and another more intense round of light balls with breaks in the floor to jump over as well. At the end of the hall on the left is a small 2 brick opening for an alcove to get a chest (#2).
Cross the hall through the right door is stairs to the obelisk.

RGB SPIDER CELLS
As soon as you begin, go to the right of the structure on the platforms to find a chest (#1).
Go into the building, press the yellow and green buttons to open the cells. The first green cell closest to the spawner has a dirt patch in the wall you can mine to get to a red button. The yellow cell across from it also has a mineable dirt patch and a red button. The second yellow cell, further from the teleport spawner, has a mineable dirt patch that leads to a platform outside the building with a chest (#2).
Back inside, the red door is open in the middle with the obelisk.

BURNING RUINS
Forward and to the left, go into this burning structure and clear the orc enemies. Turn around and clear the building behind you of orcs. There is a wooden door that leads out to a platform with a chest (#1).
Go up the stairs and clear the orcs. Drop down, where the island with the Peak Hip trees are, hop on them and behind the building on platforms for a chest (#2).
Around front of the building the purple enemy unlock door will now be open assuming all orcs are clear, giving you the obelisk.

SIEGE
This one seems to take a long time compared to the others, but killing the blossoms definitely makes it easier at the beginning. Once done, stand on the closest button to the teleporter to angle the shooter. Aim at a spawner, stand on the further button to destroy it. Blossoms will spawn. Repeat step 1 with second spawner. Behind and below the left spawner is a staircase to chest (#1).
Use purple door to enter building, destroy right staircase to reveal chest (#2).
Use left staircase to reach obelisk.

Floor 7

Floor 9 Levels

DOUBLE DOORS
Run left, use blue and green switch to open left door, remove red fallen soldiers to unlock purple door with white button. Turn off green switch, leave the blue on, will open the door to the right. Hop to reach chest (#1).
Out to the main area, use the red switch and turn off the blue switch. To the upper right there is a yellow/red door leading to another white button. Return out the door, and immediately to your left is a crystal wall. Behind it are platform stairs to chest (#2).
Across in the opposite area there is just a wall, but hop over behind it to locate the final white button to open the door to obelisk.

PIRATES
Locate the door to the inner ship you spawn on. Cross the platform you'll be in the bottom of the other ship, it's lit up purple. Directly next to the staircase up there is mineable sand leading to chest (#1).
Upstairs on the main deck you can find a red button and chest (#2).
Drop/downstairs you'll notice the red obelisk door now open.

ELECTRO STAIRS
Begin by using the yellow button on the right, and follow the staircase up, dodging the purple beams. There is another button, upstairs left, another button, upstairs left, and this other button, turn left and just drop down immediately because it's the one that opens the obelisk door. Just in front of said door, rocket or build up to reach platform directly across from door to chest (#1).
Right before the last button at the corner there is a small door leading out to platforms with blue button. The blue door is in the middle area in front of yellow obelisk door by open chest room (on the right).
If you just hit the blue button, you should be able to drop down straight from the ledge and go across to reach chest (#2)

AQUA BLUE
Run forward and jump in water, defeat all enemies encountered in order to open purple doors. Follow the hallway to blue button. Hop up and slightly to the right in the wall in front of you there is a small opening to an alcove with chest (#1).
Follow the hallway and purple doors, you'll reach a room with crystals on the left wall. Directly in front of you will be a small hole in the wall to another alcove and chest (#2).
Continue hallway to reach obelisk.

FIREPLACE
Traverse the flaming hall, get the white button to your left. You will reach a room with green button. To your right, use the doorway, go upstairs and defeat the burning golem to unlock purple enemy doors with obelisk.
Back down, to the right of the green button is alcove with chest (#1).
Exit button room to the back left. Climb dirt pile, side of building to find chest (#2). (Note, the green button is just a shortcut back to teleporter, not required)

BRIDGES
Immediately drop down on platform in front of you, next to yellow disappearing bridge to reach chest (#1).
Back up, use the yellow bridge to reach elf mage. Defeat to unlock purple door and use other yellow bridge. Elf warriors and rangers behind to spawn, defeat them all to open purple door to obelisk.
In the main area with the enemies, to the right from the obelisk room, the open air wall has a platform behind it leading to chest (#2).

GOLD
Hop up platforms dodging light balls, follow the path to reach yellow button. Use rocket/build up to platform above button to get chest (#1).
Return on the path towards teleporter - elf warriors and a purple enemy door spawn. Defeat them, and to the left on the other side of the wall is a platform, just before the unlocked door, with chest (#2).
Back in teleporter room, yellow obelisk door is now open.

ARENA
Simply use yellow button in the middle and step back if possible, green pillars will shoot projectiles and enemies spawn. Defeat everyone. On the right there's a room with crystals, hop up the wall to reach the roof and chest (#1).
If you defeated all enemies, purple door across from teleporter will now be open with obelisk.
In the left, back (towards obelisk) part of the arena in the room there's a break in the wall with chest (#2) on platform.

1, 2, 3
There is a chest immediately to the left when you spawn. It's on the side of the left building on a platform. You can jump/build to it here, or wait, go into that building to reach yellow button. There's an exit to the left that directly leads to the chest (#1).
Out to the middle, around the left of the middle building on the platform with torch, into structure, defeat elf rangers and use yellow button. Purple shortcut door now unlocked to middle, hop to the right of the middle building to use green button. Go to eastern building with yellow door to get obelisk.
Green door with chest (#2) also open behind it.

SAURIAN HALL
On the right there's a room with 2 green buttons to proceed and head downstairs. In the blue lit room, under a dirt pile is a chest (#1).
Back upstairs, facing the purple enemy door the gate is open in the middle to break the monster spawner. Continuing through the door is the obelisk on the right.
Just before the obelisk room in the hallway on the left of the doorway is a small alcove to chest (#2).

Floor 10 Levels

Floor 11

[Tiris]

Just wanted to drop by and say thank you. Your guide helped me to learn the chest locations; after that, it was essentially a speed run!