While Quake II incorporated a futuristic theme complete with alien installations, advanced weapons and a science fiction-like design, it couldn't match the original as a stand-alone game. Rather than using the traditional first-person shooter "walk from level to level" design, levels were intertwined and connected with a decent sense of flow. Whereas Quake featured horrific zombies and monsters, the sequel implemented droids, bio-organic mutants and robot warriors. Even with its amazing...