Quaver

Open-source, community-driven competitive vertical-scrolling rhythm game by Swan & The Quaver Team. Features two game modes — 4 keys (4K) and 7 keys (7K) — each with separate global and country leaderboards, real-time multiplayer (Free-For-All, Team, and Battle Royale), a map editor, and community-ranked map rotation. Free-to-play on Steam for Windows, macOS, and Linux; source available on GitHub.