When the CEO of SinTek Industries begins injecting the streets of Freeport with a DNA-altering drug, it's time to reassess the laws of morality. When this twisted bio-chemist plans to overtake the world with her army of genetically-engineered mutants, it's time to rewrite the golden rule. You are Colonel John R. Blade. You've made a religion out of the security protection industry, and now you are going to make Elexis Sinclaire pay for her sins.

Sin is the fully-integrated first-person experience brought to you by the greatest level designers in the industry. Sin features a character-driven story and revolutionary multiplayer gameplay powered by an enhanced Quake II engine.