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FPSosu

FPSosu is a custom ruleset for osu! (lazer) that turns the standard game mode into a first‑person 3D aim trainer, a la FPoSu mode for McOsu.
The standard osu! playfield is embedded in 3D and projected back onto the 2D playfield.
The mouse rotates the camera while the crosshair stays pinned to the centre of the screen; hit detection, scoring, mods and difficulty are inherited untouched from standard osu!.

Installation

• Download here
• Install Guide
• Select mode in top menu bar of osu!lazer
• Ensure 'Show Converts' is enabled in map listing
• Configure options in Rulesets -> FPSosu
• Configure controls in Input -> Configure

Recommendations

• Make liberal usage of mods, especially Difficulty Adjust and setting AR and CS
• Don't be afraid of using Spun out and/or Relax
• Adjust playfield span frequently
• Select appropriate input method in settings

Settings

All settings live under Options → Rulesets → FPSosu and apply live.

The settings screen includes a converter that matches your turn rate from other FPS titles. Enter the source game and sensitivity, and the equivalent FPSosu sensitivity is computed and applied.

Mods

Because FPSosu extends the standard ruleset, most osu! mods work as usual (Hidden, Hard Rock, DoubleTime/Nightcore, Flashlight, Relax, Easy, No Fail, …). Mods that conflict with the 3D projection are hidden from the mod list:

• Broken under projection: Autoplay, Autopilot, Cinema, Bubbles, Bloom, Barrel Roll, Deflate, Grow, Spin‑In, Transform, Wiggle
• No effect under projection: Depth, Repel, Magnetised, No Scope

Reporting Bugs

Open a new issue on GitHub

Feel free to contribute as well.