Cities: Skylines

Cities: Skylines

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CityCopter Alpha
File Size
12.427 MB
Apr 23, 2015 @ 5:55pm
May 8 @ 9:53am
3 Change Notes ( view )

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CityCopter Alpha

Early Access: CityCopter Alpha 0.1h

The source code is now available:


This is the early access version of CityCopter, called CityCopter Alpha! If all goes well, it should let you fly around (and into) your city in a helicopter, and, eventually, will have similar features to a certain Maxis game from back in the day.

Remember, this is an alpha; the helicopter model is ugly, and there *will* be bugs.

Visit for more information!



May 8th, 2016:

CityCopter Alpha 0.1h fixes the following bugs

* ReflectionError when starting Cities: Skylines with the mod installed

I've noticed an intermittent issue where the mouse cursor no longer locks, however, leaving the cursor to move around the screen when you fly. Please report this in the comments if you experience this too.

May 2nd, 2015:

CityCopter Alpha 0.1f fixes the following bugs

* Unable to takeoff when "enforce altitude limit" is set. The max altitude is now calculated based on where you place the hangar

* Some (many?) users weren't hearing the rotor sound. This has been fixed


Install the mod on Steam Workshop then start Cities and click Content Manager.

* Click "Mods" on top. Find "CityCopter Alpha 0.1" in the list of mods and turn it on

* Click "Assets" on top. Make sure you see the hangar, n916mu, and n916mu_main_rotor in the list.

You can now start a new game or load an existing one. You should see a new, green settings button on the top right of your screen. Click it and check CityCopter's settings and change them as you like.

Note that "anonymous ping" simply means that the mod will generate a random UUID and send it when you load the mod in a level, along with the version number you're running. This helps me see how many people are playing CityCopter and (in the future) verify that the Steam Workshop update process works.


Once the mod is running, you'll need to build a helicopter hangar before you can fly around. This is unlocked in the Level III unique buildings, and costs $30,000. You can use the "Unlock All" default mod to enable this early (and give me feedback if it should be easier to access). For now, place this hangar on level ground. If your helicopter gets stuck in the ground, try relocating it.

Once the hangar is built, use the "Enter Helicopter" keyboard shortcut to spawn your helicopter. The default key is Ctrl + G

* WASD will make you go up and down and roll left and right, respectively

* The mouse will turn you left and right, and pitch you up and down

* You can look around with the mouse while holding shift

Press the keyboard shortcut to stop flying.


If you encounter any bugs please go to this thread and either upvote them or add it:

* If you have trouble taking off, try turning off the height limit or repositioning your hangar. This bug seems to have affected at least a few users so far.

Configuration Options:

(Option - Default value - Description)

* Field of View - 90 - Set's the FOV on the pilot's camera

* Hotkey to Enter Helicopter - Ctrl + G - Once you've built a hangar (and it's active and has power) use this hotkey to spawn your helicopter

* Building Collision Detection - True - Enables collision detection for all building types. May negatively impact performance on slower machines

* Terrain Collision Detection - True - Allows you to collide with the ground and roads. Has less of a performance impact than building collision detection

* Invert Y Axis - True - When disabled, mouse up/down causes your helicopter to pitch upwards/downwards, respectively

* Easier Flight - True - Toggles stability control, which makes it easier to keep your helicopter in proper orientations. If you disable this, the helicopter will allow you to make any control input you wish, but it makes it easier to get yourself into trouble

* Enable Logging - False - If you encounter issues and want to report a bug, definitely enable this. It outputs text to the log file, located as CityCopterAlpha.log inside of your Cities_Skylines folder in SteamApps/Common

* Use Spotlight - False - Toggles the experimental spotlight feature

* Night Mode - False - Toggles the experimental night more feature, which looks cool

* Use Debug Keys - True - Activates the following (temporary) key controls:

. CTRL + W A S D Q E - Translates the camera inside and outside of the helicopter
. CTRL + H J K L , . - Rotates the spotlight on its pivot

* Enforce Altitude Limit - True - Slows your helicopter down when you start to exceed its operational altitude. This makes it easier to fly in some cases, and in the future different helicopters will have different operational ceilings

* Anonymous Ping on Start-up - True - Makes a simple HTTPS request when you start flight mode in the mod, which sends a random number associated with your mod as an ID (header "UUID"), a "START" header, and the version number of CityCopter that you're running. This information helps me determine what versions people have installed and how often the mod is activated, which is very useful information!


* /u/Ulysius for coding help on collision detection and some other very useful hints

* First-person Camera mod for a very helpful example of how to do a configuration UI

* All the early alpha testers, including (in no particular order) TheTrueApex, prodiG, GamingWithRyan, RobbazTube, almostchristian, lorryguy, and Guard13007. Thanks again, and sorry if I missed your name.

Thanks for playing!
Temp helicopter model by easton
Popular Discussions View All (1)
Sep 28, 2015 @ 8:15am
Helicopter Not Spawning
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GilbertRoyAlva May 22 @ 9:51am 
tnx. gonna wait for an update.
R8 Spyder May 21 @ 9:26pm 
okay,thank you for you reply
UnremittingArmadillo  [author] May 21 @ 9:25am 
It appears something got messed up when Paradox Interactive took the mod down. I'll look into it when I can
IvanTheTerrible79 May 17 @ 10:38am 
this mod dont work :(
the unique building is not present in teir 3 tab, but the options cog for the mod is. I only have this one mod and all components and everything is turned on. I even started a new save and grinded up to teir 3 buildings and its still not there
R8 Spyder May 16 @ 4:22am 
i have already set up the mod ,but i can not find hangar in the third level unique buildings,how can i fix it?
GilbertRoyAlva May 14 @ 6:26am 
It's already installed all of it but it wont even show up on my unique building list. Also i removed all the buildings installed there think the assets are blocking the chopper mod.
UnremittingArmadillo  [author] May 13 @ 8:08pm 
@GilbertRoyAlva: if you click the content manager and go to assets, do you see "hangar, n916mu, and n916mu_main_rotor" in the list? If not, something may be messed up with the Steam Workshop collection
GilbertRoyAlva May 13 @ 8:34am 
For some reason it wont show up on the unique buildings even it is already enabled in assets and mods.
Alexcheetah Apr 9 @ 8:52pm 
I having flashbacks to Sim Copter watching this!
⎛⎝LilH3ro⎠⎞ Apr 4 @ 11:48pm 
its only blurry when i use it? any mods that collide with it?