A couple that plays together, stays together! So break out the wallet and get some awesome co-op games on the cheap! The folks at GOG.com are having a massive sale in spirit of Valentine's Day, and tons of co-op titles made the list!

It's classic gaming time! GOG.com has just released System Shock 2, the spiritual predecessor to BioShock and one of the first games that made everybody stand up and nod approvingly at Ken Levine. Set in a dark cyberpunk world, System Shock 2 combines first person shooting and survivor horror elements with an intricate character customization system, giving players an enormous amount of freedom to tinker with skills like hacking, psionic powers, and good old fashion gun shooting.