Serious Sam 3: BFE

Story

Prior to AD 2060, humanity had slowly begun uncovering artifacts and ruins left behind in ancient times by the Sirians, the famous and long-thought extinct race from the place of Sirius. Unfortunately, Mental has chosen this time to turn his attention upon Earth. He dispatches his space fleet carrying his endless hordes to attack Earth, leading a three-year conquest that has humanity driven almost to the point of extinction. In a last-ditch effort, the survivors turn to the Time-Lock, a recently excavated device supposedly capable of granting a single person the ability of time travel via an i...