Serious Sam is a fast paced arcade shooter revolving around Sam's various exploits during his attempt to save the world. 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 investigate - Sam "Serious" Stone. If Mental's forces beat Sam to this powerful time-traveling artifact, it's last call for humanity! For the first time ever, put Sam behind the wheel of three serious vehicles: The Serious Jeep, The Serious Sub, and The Serious Combine. A new scoring system encourage players to get high scores and earn Gold Medals. Collecting Medals allows players to unlock hidden levels, new features, cheats and more.