Custom rulesets

Besides osu!, osu!taiko, osu!catch and osu!mania, you can play custom rulesets on somtum.fun: game modes made by the community for osu!lazer, from rulesets.info. Each one has its own leaderboards, rankings and profile tab here, ranked by score.

Supported rulesets

These are the rulesets somtum.fun ranks right now. Staff add more over time; the list in TumThai (see below) is always the current one.

Each ruleset belongs to its developers. Report a bug in the gameplay itself on that ruleset's page; report a problem with scores or leaderboards here to us.

Installing a ruleset

Custom rulesets work in TumThai (our osu!lazer client) on Windows, Linux and macOS, and in TumThai!Next on Android too (pick TumThai!Next on the download page). They don't work in osu!(stable), the old clients or TumThai's Android app.

1. Sign in to TumThai.
2. Open Settings → General → Custom rulesets and press Install custom rulesets…
3. Press Install next to a ruleset. It appears in the ruleset bar at the top of the screen right away.

The same window shows when a ruleset has an update: press Update, then restart TumThai. Removing a ruleset also takes effect when TumThai restarts.

Only the version somtum.fun ranks submits scores, so install and update rulesets from this window. A ruleset file you put in TumThai's rulesets folder yourself still plays, but its scores only submit when it's the same file. If a ruleset says Doesn't work with this TumThai version, it needs an update from its developers; until then it can't be played.

On phones and tablets

Custom rulesets are made by their developers for PC first, and most aren't designed for touchscreens. On a phone or tablet, some can't be played properly by touch, some controls may be missing or awkward, and some may not work at all. This comes from how each ruleset is made, so we can't fix it on our side: only the ruleset's developers can add touch support.

• sentakki is made for touch and is the best one to start with.
• osu!fps, FPSosu!, Tau, bosu and touhosu need a mouse and keyboard. They may load on a phone, but expect them to be hard or impossible to play.
• A mouse or keyboard plugged into your phone helps with some of them.

If a ruleset crashes or doesn't load on your phone, play it on PC instead, or tell its developers on its page (linked in the table above).

Scores and rankings

• Ranked by score. Custom rulesets give no performance points (pp), so there's no pp rank for them.
• Which plays count: a passed play on an osu! map with a leaderboard (ranked, approved, qualified or loved). Plays with Autoplay or Cinema, or a ruleset's own auto-play mod, don't count.
• Leaderboards: each map has a leaderboard per ruleset, with your best score on it. Relax and Autopilot plays have their own boards, as in osu!.
• Rankings: the custom ruleset rankings add up everyone's best score on each ranked map (ranked score).
• Your profile has a tab for each ruleset you've played, with your rank, scores and rank history.
• Star ratings show for rulesets that calculate them (Tau and soyokaze, for example).

Your new score shows on the website and in the Discord bot as soon as it's submitted. TumThai 2026.1026.1 and newer show your new rank on the results screen too.

What isn't supported

• Performance points: rankings are by score only.
• Multiplayer and spectating.
• Replay renders: the score page and the Discord bot say a render isn't available for a custom ruleset.
• Medals.
• osu!(stable), the old clients and TumThai's Android app (TumThai!Next on Android works).

See also

• FAQ
• Performance points
• rulesets.info, where these rulesets come from