Translation: you walk around basic levels killing everything in sight solving puzzles no harder than pushing the right buttons to open doors. You must attack and kill these 'time strikers' and investigate what is going on.
There are different 'rifts' in time, and aggressive creatures from the past, present and future are infiltrating our time. Like most 3D shooters, Chasm incorporates only a vaguely thought-out story. Chasm: The Rift is a marginally above-average first-person shooter that would have probably been better known had it been released before the likes of Quake II and Jedi Knights.
