An open-source, fast-paced arena shooter featuring parkour mechanics, multiplayer modes, and a realtime WYSIWYG map editor for cooperative map creation.
530 stars111 forkslast commit Actively maintained

Quake Champions is a free-to-play online arena first-person shooter by id Software/Bethesda offering fast-paced multiplayer matches, champion-specific abilities, weapon pickups, and competitive/ranked play on PC.
An open-source, fast-paced arena shooter featuring parkour mechanics, multiplayer modes, and a realtime WYSIWYG map editor for cooperative map creation.
530 stars111 forkslast commit Actively maintained
Open-source 2D browser battle royale inspired by surviv.io. Client and server in TypeScript with real-time multiplayer, Pixi-based rendering, and self-hosting support.

497 stars238 forksGPL-3.0last commit Actively maintained
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 2 of 2 shipped a commit in the last six months. Licences in this list: GPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Video Media Servers.