Quake 3 Fortress for Mac lies within Games, more precisely General.
From the developer:
Quake 3 Fortress is based on the classic and all-time popular Classic Quake class-based mod, Team Fortress. The mod offers primarily team based capture the flag type gameplay, but this new version also gives you some slight twists such as "capture and hold" games - where you try to hold on to the "flag" (it's actually a duck) for as long as possible without getting killed.
You may want to check out more Mac applications, such as Fortress Under Siege, Quake Live or Roaming Fortress, which might be similar to Quake 3 Fortress.
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