An abandoned mothership of Sirian origin is sending strange signals from the past, and there's only one man with the guns big enough to travel back in time and investigate — Serious Sam. If Mental's mutated forces get to this powerful time-traveling artifact before Sam, it's last call for humanity!

This is serious.

• Over 40 vibrant levels spread across three ancient time periods.
• A huge arsenal of weapons for Sam to use against Mental's minions.
• Get behind the wheel of some serious vehicles to run down your opponents!
• Go online and rack up the frags in 8-player deathmatches!