AirQuake2 is a TC (Total Conversion) for id Software's Quake2. AirQuake2 is however a radically different style of game from Quake2: instead of a 1st-person shoot-em-up, AirQuake2 is a 3rd-person flight-sim.
Maps archive especially for AirQuake2. Extract *.bsp as usual C:\Program Files (x86)\Steam\steamapps\common\Quake 2\air\maps
its bad, most maps dont work with airquake2 and they use custom textures wich arent there so pretty much 90% of the maps are red and black squares.