Archipelago is a multiworld, multi-game randomizer. By connecting to an Archipelago server, any of the supported games can play together in a multiworld.
All weapons and arms are randomized. Extra abilities can also be randomized, including the ability to dash, walljump, slide, slam, and use a weapon's alternate fire.
Items are found by collecting secrets, and optionally by completing level challenges and getting Perfect Ranks.
Levels are unlocked by finding access to them within the multiworld. Levels can either be unlocked individually, or whole layers at once.
One level must be chosen as a goal for the randomizer, and a number of levels must be completed to unlock the goal. Completing secret missions and Prime Sanctums will also count. Prime Sanctums will never be considered in logic, unless chosen as the goal level.
Levels will be unlocked for all difficulties, and you can switch difficulties at any time.
Skulls can also be randomized, meaning they will not appear in any levels until found in the multiworld.
Note that the logic for the randomizer assumes that the player is willing to take intentional damage to get items.
Download the Archipelago mod by using a Thunderstore Mod Manager, or manually by extracting the contents of the zip file into the UMM Mods folder.
Download and install Archipelago. Then, download ultrakill.apworld from the mod's releases page and add it to your worlds folder. (Default path: C:\ProgramData\Archipelago\lib\worlds)
Set up all .yaml files for each player in the multiworld, then add them to the Players folder. A template can be downloaded for ULTRAKILL from the mod's releases page.
Run ArchipelagoGenerate.exe to generate a game, which will appear in the output folder.
Host a game, either manually, or by uploading it to the Archipelago website.
Enable Archipelago in game, then restart ULTRAKILL.
To connect to the server, first select a new save file, then press F8 and use the command connect [address:port] [player] [password]. The port and password are both optional - if no port is given, then the default port of 38281 will be used.
There are some additional commands that can be used:
disconnect: Disconnect from an Archipelago server.say [message]: Send messages or commands to the server.log: Adjust the messages that appear at the bottom of the screen while connected to a server.
log size [int]: Change the font size.log lines [int]: Change the number of lines that will be displayed.log clear: Clears all messages.log toggle: Shows/hides the messages.Not yet. I would like to make a standalone version of the randomizer eventually, but since the Archipelago version already works well enough, I'm releasing it now.
If you have trouble setting up ULTRAKILL randomizer or have found any bugs that need fixing, feel free to ask about it on the GitHub discussions page, or you can DM me on Discord at TRPG#8501.