UltraTimerFix

v1.0.3·Updated 2026-09-24

Fixes the Ultrakill timer to be more accurate. Source code is in the mod.

About this mod Author’s original text

UltraTimerFix

A relatively small mod fixing an issue with the in-game timer wherein the in-game timer would be gradually less and less accurate due to floating point error. Although this one is still not perfectly accurate, it is more accurate than the old timer.

With the old timer, the timer went up to 0.4 seconds of inaccuracy over just 4m 30s due to frame stutters and the old delta time method.

[hakita pls fix]

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This uses Time.time so it should be accurate down to the millisecond up until ~9 hours in. Yes, this does not fully fix the issue, but it mitigates it to the point where it should not affect regular gameplay and most speedruns.

Source code is in the mod.

Please ping me on the Ultrakill Modding server if you notice a discrepancy between the game and the mod [timer desync, timer continuing/stopping where it shouldnt, etc.]

Changelog:

v1.0.1 - Fixed icon, cleaned up website

v1.0.2 - Cleaned code up

v1.0.3 - Fixed issue relating to timer inaccuracy in 8-1.

Depends on BepinEx.

License: MIT

Install & use Install: BepInEx plugin

  1. The archive from playbuff is the mod itself — usually a BepInEx plugin (a .dll or a plugin folder once unzipped).
  2. Recommended: use a community mod manager (such as r2modman) — pick this game, import the mod, and the manager sets up BepInEx and its dependencies for you.
  3. Manual route: install the BepInEx loader in the game folder, then drop the unzipped .dll or plugin folder into BepInEx/plugins/.
  4. Launch the game — the BepInEx console logs every plugin it loads; seeing this mod in the log means it is installed.

Mods with listed dependencies need those installed too, or they will not load. Options are usually changed in-game or in the plugin's config file.

Dependencies

Install these first, or the mod will not work:

BepInEx-BepInExPack

File & checksum

Filename
UltraTimerFix-1.0.3.zip
File size
39.5 KiB