OpenArena Competitive is an unofficial server for OpenArena FPS where we organize tournaments and pickups games. You can also use it for scheduling clan wars and finding players for public games.
Team Fortress 2 Vintage is an community created, open source version of Team Fortress 2.
https://www.moddb.com/mods/team-fortress-2-vintage
https://steamcommunity.com/groups/TF2_Vintage
