Valve announced the official launch of Steam Trading, which was in beta a few weeks ago, allowing gamers to exchange in-game items and game gifts.

A war is raging over the planet which has left it in chaos and ruin. A zombie virus has rapidly spread through the human population across the globe, leaving it with one hope — you. Among the few capable of fighting back and surviving the mayhem and destruction, your mission is to take on the zombie masses and come out alive.

Microsoft has revealed what Xbox Live members can expect to see on the Marketplace Sept 6 – Sept 19, such as Crimson Alliance, BloodRayne Betrayal, and Homefront as On Demand title.

Global Ops: Commando Libya is a plot-driven squad-based action game with contemporary reference to the current Libyan conflict. The player is part of a special team that has to stop the threat of an atomic catastrophe by Arab terrorists either in a solo mission or with his AI buddies.

Based on the last three Harry Potter books and final four films, LEGO Harry Potter: Years 5-7 takes players through Harry Potter’s heroic adventures in the Muggle and wizarding worlds.

Defenders of Ardania is set in the rich fantasy world of Majesty, but with a twist. Besides the addictive core mechanics of placing towers to stop advancing enemy units, Defenders of Ardania also allows players to take on the role of the attackers seeking to conquer the enemy base.

Dead Island is a FPP shooter that combines elements of the survival horror genre and adventure games. The game tells the story of a couple being tossed ashore onto the sandy beaches of a desolate, zombie infested, island.

The Fantasy/Role-playing RTS returns in a sequel set to push the boundaries of the genre even further. King Arthur II will feature a new and dark fantasy setting. No longer a valiant ruler, King Arthur is now the Maimed King trying to mend a land almost beyond repair in a stunning new plot.

In Deus Ex: Human Revolution you play Adam Jensen, a security specialist, handpicked to oversee the defense of one of America's most experimental biotechnology firms. But when a black ops team breaks in and kills the scientists you were hired to protect, everything you thought you knew about your job changes.

Featuring an 83-song set list and access to far more music than ever before, as well as innovative new gameplay modes and instruments, Rock Band 3 will change the way fans think about and play music games.

Prepare to dive into the world of Dragon Ball Z with Earth-shaking combat, a massive character selection, faithful manga-style graphics, and exciting new features.

Ms. Splosion Man is a 2.5D action/platformer based around the simple concept of 'splosions and the ridiculousness that ensues, featuring up to co-op multiplayer, local and online, a story mode chock full of hilarious cinemas seamlessly integrated into gameplay, and epic boss battles.

Red Dead Redemption is a Western epic, set at the turn of the 20th century when the lawless and chaotic badlands began to give way to the expanding reach of government and the spread of the Industrial Age.

Dungeon Siege III brings together the beloved aspects of the Dungeon Siege franchise with Obsidian Entertainment's expertise, to create an evolved action-RPG experience. In addition to its arrival on high-def consoles for the first time, the game also features an all-new co-op multiplayer mode.

Nascar Unleashed will allow players to take their racer “to the streets” by driving on AND off some of Nascar's most famous tracks in this stylistically souped-up arcade racing competition.

Strategic Command World War One 1914-1918 The Great War is a brand new historically accurate simulation of The Great War that helped shape Europe and the entire world as we know today at the beginning of the 20th Century.

Rise of Immortals is an online, free-to-play PC game that expands on the Multiplayer Online Battle Arena (MOBA) genre with new innovative features designed to appeal to both core and casual players.

Wargame: European Escalation is built around depth and reflection, the key elements of classic wargames, featuring intense real-time battles, stunning graphics, and the amazing IRISZOOM system, which allows a continuous zoom from a global view of the map to the heart of the action.

The House of the Dead: Overkill is an all-new pulp-horror reinvention of the classic SEGA light-gun shooter franchise, taking you right back to the beginning of this classic horror series, for the first time in full HD with 3D support and Move compatibility.

Strategic Command World War One 1914-1918 The Great War is a brand new historically accurate simulation of The Great War that helped shape Europe and the entire world as we know today at the beginning of the 20th Century.

Hitman Absolution follows Agent 47, a cold-blooded assassin, who takes on his most dangerous contract to date. Betrayed by those he once trusted — and now hunted by the police — he suddenly finds himself at the center of a dark conspiracy and must embark on a personal journey through a corrupt and twisted world.

Skydrift is an intense, high-speed arcade racing game spiced with thrilling combat elements. Players will be taken closer than ever before to the world of adrenaline pumping sky-racing. Everybody can test and master their flying and combat skills against deadly opponents.

Nintendo 3DS Ambassadors will be able to download 10 NES Virtual Console games at no charge (on Sept. 1, 2011) and before they are available in the Nintendo eShop to the general public.

In Rhythm Thief & the Emperor's Treasure, players are immersed in the mysterious rhythmic adventure in the city of Paris, recreated in stunning 3D vision.

The Haunted: Hell's Reach is a fast paced third person action horror game that focuses on delivering an intense multiplayer experience. Your goal is to liberate cursed places and survive the assault from the minions of hell.