Urban terror is a fast, bloody and very fun to play. total It has various game types like deathmatch, team deathmatch, team survivor, capture the flag and others. It has an advanced hit detection, you can slow down an enemy unit by hitting it on the legs or go for a quick kill giving it a headshot. The units must bandage themselves or call for a medic to stop bleeding from a shot. For more info check the site.

Urban Terror is available as Quake III Arena Mod, or as Standalone Client

License: free

Additional System Requirements: Quake III Arena for Punkbuster Support.