Digital Paint: Paintball 2 is a Paintball game that started out as a mod for quake 2 but then took on a life of its own as an open source fps game with a global player and clan management system.
United States
Open Source Unreal Tournament (Series) Alternatives
The best open source alternative to Unreal Tournament is Xonotic. If that doesn't suit you, our users have ranked more than 25 alternatives to Unreal Tournament and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Unreal Tournament are AssaultCube, Red Eclipse, Warsow and Cube 2: Sauerbraten.
Alternatives list
Freedoom is a WIP a complete free content game based on the Doom engine. It's not an engine, but it's replacement game data with entirely original content, Compatible with a majority of game mods made for Doom. Comes in Three Flavors~.
+9
A truly free and open source multiplayer shooter, no strings attached. Have casual deathmatch matches on various scenarios. Build your own levels with the ingame editor and assets that come with the game, or just play around and use it as a sandbox.
Germany
EU
+1
a first-person shooter game focused on instagib deathmatch and capture-the-flag gameplay as well as cooperative in-game map editing.
+1
Touhou Project is a Japanese vertically scrolling bullet hell [shooting](https://alternativeto.
Japan
+5
The Hammer of Thyrion project is a cross-platform source port effort of Raven Software's Hexen. Last updated 2018-06-06.
+3
United Kingdom
+2
HateArena is a (very) fast-paced multiplayer and single-player arena shooter. Wall-jumping, shotgun-boosting arena combat built on the Cube engine.
+8
