Cortez might have destroyed the TimeSplitter army in 2243 but that hasn't stopped Crow! There's a grotesquely mutated cyborg on the loose and he could easily travel to another time and place and start all over again. The only way to permanently stop Crow is to prevent him from mining the crystals in the first place. Without the Time Crystals, Crow could never have built a time device and then, the TimeSplitters will never have been created at all. So, back to 1924 and under the remote Scottish island of Urnsay where Cortez and R-110 have a mission - to find and destroy the source of the crystals and the time travel device ending Crow's insanity before it begins!