Gaming Nexus writes: "The evil Mental and his minions waged battle against the Sirians long ago on Earth. In the 22nd century, Mental's forces return to our planet intent on wiping out the human race. Mankind rallies together in vain, but manage to get an item that can send one person back in time. The goal is to send their best hope to defeat Mental and change the course of history. Sam "Serious" Stone is that hope."