http://store.steampowered.com/sub/434/
Quake 4.99
Quake II 4.99
Quake II mission pack: Ground Zero 2.49
Quake II mission pack: The Reckoning 2.49
Quake III Arena 9.99
Quake III Team arena 9.99
QUAKE Mission Pack 1: Scourge of Armagon 2.49
QUAKE Mission Pack 2: Dissolution of Eternity 2.49
Or...