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Splice

This indie game allows you to play God by moving cells with other cells and stuff happens, somehow. You have to move the cells or capsules to match the pattern shown. I'm not really sure what happens or what the purpose is, but at least you can do it in multimon.

Tony Hawk's Pro Skater HD

Tony Hawk's Pro Skater HD (abbreviated THPS HD) is a skateboarding video game in the Tony Hawk's series of skateboarding games. The game is a high-definition re-release featuring classic levels from Tony Hawk's Pro Skater and Tony Hawk's Pro Skater.

Borderlands 2

Borderlands 2 is a science fiction–based first-person shooter with RPG elements and the sequel to 2009's Borderlands. At the start of the game, players select one of four new characters, each with a unique special skill and with proficiencies with certain weapons. From then on, players take on quests assigned through non-player characters or from bounty boards, each typically rewarding the player with experience points, money, and sometimes a reward item.

Torchlight II

Torchlight II is the sequel to the wildly popular (and successful) action-RPG, Torchlight. The sequel brings the often requested multi-player co-op feature, through peer-to-peer multiplayer support. Torchlight II will feature randomly-generated dungeons for the player to explore, and numerous types of monsters to fight for experience and loot.

F1 2012

F1 2012 is the latest simulation racing game from Codemasters, based around the 2012 Formula One season. Featuring young driver tests and career modes, the game also has improved car dynamics and a new co-operative season mode.

Unmechanical

You're a tiny utility robot stranded in a strange underground place. Using only the rotor on your head and the tractor beam... underneath, it's time to explore, push buttons, haul stuff around and make your way through puzzles that involve physics, logic or memory. A demo is available in Steam and also as a DRM-free download, so there's absolutely no reason not to check this lovely little game out.

Sleeping Dogs

This GTA3-like lets you experience the life of an undercover cop in the brutal world of Honk Kong triads. Contains graphical violence, strong language and explicit kung-fu.

Symphony

Symphony is a vertical shooter type game which, like Audiosurf and Beat Hazard (among others) generates the levels based on your music. It ranges from easy to mind-blowingly difficult, with the higher difficulties becoming unlocked as you progress through the game and recover pages of the "Symphony of Souls"; created when a mysterious entity invaded and tried to take over by capturing the souls of musicians. This mysterious entity is absorbing and corrupting your music before your eyes.

Lone Survivor

Lone Survivor is a 2012 independent survival horror video game, developed by Jasper Byrne under Superflat Games.

Cave Story+

Cave Story platform-adventure video game released in 2004 for the PC. It was developed, designed, and programmed over five years by Daisuke "Pixel" Amaya in his free time. Cave Story features 2D platform mechanics and is intended as an homage to the classic games that the author played in his youth, such as Metroid, Blaster Master, and Castlevania.