Competitive

Shaun White Snowboarding

SW is a snowboard game with multiple challenges to choose from in open environments, not unlike the late Tony Hawk's Pro Skater series' most recent titles. The Scimitar engine (Assassin's Creed, Prince of Persia 2008) supposedly allows the gameplay to rely solely on physics whereas most "board" games are animation-based. A more obvious feature though is that you can control your avatar through some half-pipe fun during loading times, something AC's Altayr probably misses terribly.

Grand Theft Auto IV

The fourth installment of the popular series by Rockstar features improved graphics, new features, and new gameplay. Players take on the role of Niko Bellic, a rough-around-the-edge chap from Eastern Europe. Niko has arrived in America, in Liberty City -- a land full of promise and opportunity. His cousin convinced him to emigrate, to join him in his mansion and life of luxury, but as soon as he steps off the boat, Niko discovers the truth about the American way. Still, the wealth, the comfort, the bliss of the good life, it all really is here ... And it's all for the taking.

Multiwinia

Multiplayer take on Darwinia. Indie game darling "Darwinia" realized in multi-player fashion.

Titan Quest

Titan Quest is an action RPG by THQ, in the vein of Diablo II. The game is in the historical fantasy genre. Titan Quest is a 3D 'hack and slash' (acton RPG) featuring monsters inspired by ancient mythologies. It has gorgeous graphics, day/night cycle, ragdoll animations, WYSIWYG loot system - and of course, heaps of equipment to collect.
Immortal Throne adds in a whole new chapter (all-new places, quests, monsters and loot), a new mastery with its unique skills, and an array of other new gameplay elements.

Switchball

Switchball is made by Swedish developer Atomic Elbow, which was released for Microsoft Windows on June 26, 2007. Switchball is an intricate puzzle game set in a stunning 3D world. Control an ever-changing ball along a narrow winding course suspended in midair. Solve your way through challenging levels jam-packed with obstacles, traps and mazes. Morph the marble ball with metal, electric and lighter-than-air properties to more easily get through each area.

Pure

Pure is an arcade ATV racing game. It lets you build and upgrade your quads piece by piece and drive them around multiple-track circuits in outdoors locations. Catch some big air, perform surreal tricks and use nitro boost as you compete against a dozen AI opponents. The game also features both LAN and online multiplayer modes.

Left 4 Dead

Left 4 Dead is a multiplayer first person shooter from Valve, inspired by recent "zombie apocalypse" movies such as 28 Days Later and I Am Legend. You and three other players must cooperate to progress through a series of environments while fending off an unending onslaught of virus-infected ghouls.

Once Upon a Knight (KnightShift)

This is a hybrid game that mixes RTS and level-gaining RPG elements. Campaign, RPG, and Skirmish modes are available.
A built-in map editor allows you to create levels for online or offline use.

S.T.A.L.K.E.R.: Clear Sky

S.T.A.L.K.E.R.: Clear Sky, is the prequel to S.T.A.L.K.E.R.: Shadow of Chernobyl, a first-person shooter video game by Ukrainian developer GSC Game World. The game consists of a roughly 50/50 mix of new areas and old, remodeled areas from the previous game. The X-ray graphics engine has been updated to version 1.5 and includes DirectX 10 support (later patch 1.5.06 included DirectX 10.1). Additionally, the AI received an overhaul to accommodate the new faction wars feature.

Stranglehold v1.1

Stranglehold, or John Woo Presents Stranglehold, is a third-person shooter developed by Midway Games' Chicago studio, released in late 2007 for Windows, PlayStation 3, and Xbox 360. It is Midway's first game to use Unreal Engine 3, and was developed in collaboration with John Woo.
The game is the sequel to Woo's 1992 Hong Kong action film, Hard Boiled, and stars Chow Yun-fat in a reprisal of his role as hard-boiled cop Inspector "Tequila" Yuen. Stranglehold is the first project on which Woo and Chow have collaborated since Hard Boiled.