OpenArena is a free and open source first-person shooter game based heavily on the Quake III Arena-style deathmatch. Score frags to win the game using a balanced set of weapons each designed for different situations. Guns include a chaingun, rocket launcher, shotgun, and railgun.

OpenArena's style of play is very fast and requires skill to be played successfully online. Gameplay modes include Deathmatch, Team Deathmatch, Tournament, Capture the Flag, Elimination, CTF Elimination, Last Man Standing and Double Domination.