

Confused at the moment and with nothing better to do, Sam accepts the mission. The Council instructs Sam to visit all five planets in order to recreate the medallion, only then will Sam become "The One". All the planets (except the planet Kleer) are populated by friendly, bobble-headed humanoids, but the problem is that all the planets are under Mental's control. The Council reveals to Sam that he must collect all five pieces of an ancient Medallion, each held by various groups on five different planets, and states that once Sam has the entire medallion, Mental will be vulnerable.


The game begins with Sam being summoned before the Sirian Great Council, where the Council provides him with guidance on how to accomplish his goal to defeat Mental. The game's story picks up shortly after the end of Serious Sam: The Second Encounter, with Serious Sam continuing his goal to defeat his arch nemesis, Mental.
