I Got Every Achievement Except Dead God. Now What?

[Bmash13]

I'm missing these items in my Collection Page:
1. Mega Blast
2. Luna
3. Death Certificate
4. Strawman
5. Redemption
6. Vanishing Twin
7. Twisted Pair
8. Echo Chamber
9. Isaac's Tomb
10. Vengeful Spirit
11. Esau Jr.
12. TMTRAINER
13. Spindown Dice
14. Ghost Bombs
15. Decap Attack

These 15 items are the only things standing between me and Dead God. What is the quickest method to find these?

[Dwarvin' Marvin]

Almost all of those are secret room items. Your best bet is probably doing a bunch of rigging with Isaac. Creating pedestals in secret rooms and then repeatedly rolling them until you get something you need. Death Certificate will let you get two birds with one stone. I'd prioritise getting Luna with it because it's planetarium pool.

Redemption is an angel item. Twisted Pair, Vengeful Spirit, and Mega Blast are devil items. Vengeful Spirit can also appear in ultra secret room.
Luna is planetarium pool, so you'll either need to force planetariums, get it through Death Certificate, or get lucky with Chaos.
Decap Attack, Esau Jr, and Ghost Bombs are treasure room pool, so if you just play the game and go to the chest a bunch you're bound to find them eventually.

[phantom dier WWWWWWWWWWWWWWWWWWW]

go greed mode, restart until you see d20 in shop, get d20, find a shop with battery in it (or roll shop until you see battery), save all coins on the floor then d20 them, open all chests and only take nickels and dimes and batteries (and a skeleton key if you don't have one), buy another battery, d20 them and repeat. eventually you get chaos and can get all the items. easiest way to break isaac and get whatever you want. just make sure to quit to main menu to save once in a while in case you crash from crazy tears.

[weed_turbine666]

when the last item i didnt pick (on ab+) i just picked eden and started reseting until i got it, it worked.

[steven]

SOURCE : WIKI
I refer below to the pools of items. Almost all the pools refers to where you can find them like Planetarium Pool found in .... Planetarium ! LOL
The exception is the Devil Room Pool = Devil Deal + Hell game beggar (shell game with hearts)

All the items have weight distribution W :

- a weight of 1 means you have as much chance to find this item as to find another item with the same weight
(ex : a pool of 10 items with each of them W=1, so 1/10 chance to find the item you want)
- a weight of less than one means you have less chance to find this item in the pool than an item with W=1
EX : Mega Blast, W (devil room) = 0.2 --> it's 80% less likely to find this item in the pool

In a CLASSIC runs (not greed/ier mode), the Pools are :

1- Mega Blast = Devil Rooms (W=0.2)
2- Luna = Planetarium (W=1)
3- Death Certificate = Secret Room (W=1)
4- Strawman = Secret Room (W=1)
5- Redemption = NOT IN ANY ITEM POOL (W=0)
(take a Devil Deal, then use a Sacrifice Room or Confessional, it should spawn)
6 - Vanishing Twin = Secret Room / Curse Room (W=0.5 for both)
7- Twisted Pair = Devil Room / Shop when holding "Adoption paper" (W=1 for both)
8- Echo Chamber = Secret Room / Ultra Secret Room (W=1 for both)
9- Isaac's Tomb = Secret Room (W=1)
10- Vengeful Spirit = Devil Rooms / Curse Room / Ultra Secret Room (W=1 for all)
11- Esau Jr. = Secret Room (W=1) / Treasure Room (W=0.5) / Ultra Secret Room (W=1)
12- TMTRAINER = Secret Room (W=1)
13- Spindown Dice = Secret Room (W=1) / Treasure Room (W=0.1)/ Crane Game (W=1)
14- Ghost Bombs = Bomb bum / Treasure Room (W=1 for both)
15- Decap Attack = Treasure Room (W=1)

So :

* Devil Rooms (3) = Mega Blast, Twisted Pair, Vengeful Spirit
* Planetarium = Luna
* Secret Room (8) = Death Certificate, Strawman, Vanishing Twin, Echo Chamber, Isaac Tomb, Esau Jr, TMTrainer, Spindown Dice
* Ultra Secret Room (3) = Echo Chamber, Vengeful Spirit, Esau Jr
* Treasure Room (4) = Esau Jr, Spindown Dice, Ghost Bomb, Decap Attack
* Curse Room (2) = Vanishing Twin, Vengeful Spirit
* Shop with Adoption Papers = Twisted Pair
* Beggars / Arcade : Bomb for Ghost bomb, Crane game for Spindown dice, Hell Game for any Devil Item

If you go Greed/ier, some items will not appear at all (ex : vanishing twin) EVEN IF YOU TAKE CHAOS and some weight change !!!!
Each POOL of items is separated between each mode !
EX :
- TWISTED PAIR will never appear in greed, even with CHAOS !
- Strawman W=0.1 in greed/ier instead of W=1 in classic runs

What i see is :

- you seems to never go to Secret Rooms, or you are extremely unlucky when you go in it, so no item generate, only coins, bomb, keys....
- you don't have often Red Key / any thing that generate Red Rooms or when you have it you don't search for the ultra secret room or are unlucky
- you are unlucky with the planetariums and never had Luna before
- MegaBlast, Vanishing Twin and Esau Jr (treasure room) will be hard to find with a W < 1

Methods :

- Eden and reset a lot, or T.eden and take damage with some items of pools you want (ex : take devil room pool items, the hit will reroll then in the same pool)
--> you can be short on token fast, it's hard and time consuming

- Isaac and reroll with D6 every Pool of item, or T.Isaac
--> time consuming / hard, T.Isaac can be hard with timings

- Death Certificate : find one and you can choose any item you miss
--> hard to find one in a run

- T.Cain with bag of crafting
--> Really hard since every recipe is randomized, and not all the items are craftable

- Greed mode, Chaos and D20 shenanigans as Millie said
--> not all items can be found in greed even with Chaos

-Play, do some runs, you will find them one day

- Last resort : debug console to spawn items immediately if you find the ID online