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UKButt

Short link: pitr.dev/ukbutt

UKButt is an official BepInEx mod for ULTRAKILL that adds buttplug.io support.

Resources

Video

IMAGE ALT TEXT HERE

Installation

Start by installing BepInEx 5.4.21

You can also follow one of the Community Made Videos, since BepInEx is commonly used.

Next, download the latest release from the release page and extract the dll files into ULTRAKILL/BepInEx/plugins.

Lastly, you need to install Intiface Central from buttplug.io.

The mod connects to Intiface on port 12345 by default, which is the default port for Intiface Central as well.

Running

Before starting the game itself, launch Intiface Central and start the Intiface Server with the big Start Server button.

Intiface Central

That's where you can configure the server and the devices you want to use.

You might have to enable some devices in the settings, depending on what it is.

ULTRAKILL

Next, you should be able to start the game and see Intiface Central connect to the game.

The mod should be functional now.

Configuration

The mod uses ULTRAKILL's preference system and saves its configuration into the Steam Cloud-less ULTRAKILL/Preferences/LocalPrefs.json file, with a ukbutt. prefix.

Preferably, you should change them using the in-game console available by pressing F8.

You can use the ukbutt command to list all available commands.

or ukbutt prefs to get the list of all available preferences and how to change them.

Console

Default Values

<!-- table -->
KeyTypeDescriptionDefault
ukbutt.socketUristringThe URI of the Intiface Server.ws://localhost:12345
ukbutt.strengthfloatThe strength of the vibration.0.8
ukbutt.stickForSecondsfloatThe minimum duration of a vibration. (in seconds)2.0
ukbutt.tapStickForSecondsfloatSame as above, but for events marked as subtle.0.2
ukbutt.useUnscaledTimeboolWhether to use unscaled (real) time for the duration of the vibration.false
ukbutt.enableMenuHapticsboolWhether to enable haptics in the main menu.true
ukbutt.inputModeintThe current InputMode.1
ukbutt.strokeWhileIdleboolIf in menu or rank == 0, stroke at lowest speed (rank mode only)false
ukbutt.linearPosMinfloatLowest position for stroker movement (rank mode only)0.1
ukbutt.linearPosMaxfloatHighest position for stroker movement (rank mode only)0.9
ukbutt.linearTimeMinfloatStroker frequency timing in seconds (rank at ULTRAKILL, rank mode only)0.3
ukbutt.linearTimeMaxfloatStroker frequency timing in seconds (rank at None/Idle, rank mode only)1.5

InputModes

<!-- table -->
IndexDescription
0Nothing
1Varied (default)
2Continuous Rank
3Passthrough

You can change the input mode in-game by using prefs set_local int ukbutt.inputMode <index>

Mode interaction with hardware:

Passthrough Mode

Note that if you're using the Passthrough mode, the preferences set through the mod won't be used.

In that mode, you can configure the values via the in-game General > Controller Rumble > Customize menu.

img_1.png

Support

If you have issues installing or using Intiface Central, you can either visit the Buttplug.io discord or DM the @buttplugio twitter account.

If you need a list of hardware supported by Intiface Central, visit IOSTIndex.com, which has a full list of supported hardware.