Civilization V reinvigorates the classic turn-based strategy genre with a new engine built from the ground-up. Players are introduced to a new combat system, deeper diplomatic interactions and a cavalcade of expanded features that deliver a fully immersive experience.

Based on Games Workshop's fantasy football game world, Blood Bowl: Star Coach is a free-to-play tactical multiplayer team-building game.

Joe Danger 2: The Movie allows players to create their own action film scene by scene, and then they can perform the stunts.

Defiance introduces players to a world where humans and aliens live together on a planet ravaged by decades of conflict. The game combines the intense action of a shooter, with the persistence, scale, and customization of an MMO, while its TV counterpart exudes the scope, story, and drama of a sci-fi epic.

Valve announced Steam Trading Cards, a new service that rewards gamers for gaming on Steam.

City of Steam is a browser based 3D industrial age fantasy MMORPG set in a steampunk-inspired universe.

Calling the craziest helicopter pilots: the notorious Thunder Wolves are looking for a new member to join the fight against global terrorism.

Online multiplayer games have been available on Steam for quite a while, but prior to today you could not manage the monthly subscriptions that came with said titles.

Insurgency is a first-person team-based shooter for up to 32-plus players based on the Half-Life 2 total conversion Insurgency: Modern Infantry Combat.

Worms Revolution has been developed from the ground up and features a completely new game-engine. Exciting new features and challenges have been introduced whilst old favorites such as the Super Sheep and Holy Hand Grenade remain to thrill fans worldwide.

The fear that was originally brought to players in Resident Evil Revelations on the 3DS returns redefined for home consoles complete with high quality HD visuals, enhanced lighting effects and an immersive sound experience.

Shadowrun Returns is a single-player 2D turn-based RPG featuring an interactive story, with narrative work provided by a multitude of former Shadowrun authors and designers.

Jagged Alliance Online will follow the same basic principle as its predecessors, keeping the popular mixture of tactics, strategy, role-play and management and transferring it to a modern MMO world.

Valve announced the addition of an Early Access section to Steam's library of over 2,000 titles.

StarDrive is a 4X Action-Strategy game where the goal is to build a space empire.  Starting with a single planet and a small number of space-worthy vessels, you forge out into the galaxy, exploring new worlds, building new colonies, and discovering the StarDrive universe.

Set in 1912, BioShock Infinite introduces an entirely new narrative experience that lifts players out of the familiar confines of Rapture and rockets them to Columbia, an immense city in the sky.

Gratuitous Space Battles is a strategy/management/simulation game that does away with all the base building delays and gets straight to the meat and potatoes of science-fiction games: the big space battles fought by huge spaceships with tons of laser beams and things going 'zap!', 'ka-boom!' and 'ka-pow!'.

Combining over 10 years of experience, building upon the strength of its predecessors, and set in the most detailed environment of the series to date, Arma 3 offers gamers radical engine improvements and a unique sandbox-style military gameplay experience.

Powered by Unreal Engine 3, Painkiller Hell & Damnation re-creates the sensations and hardcore gameplay of the original Painkiller, which won praise for its fast, unique gameplay.

Valve announced the launch of Steam Guides, a new capability of the platform that allows players to create and/or find guides for their favorite games or Software titles on Steam.

Gamers will have a final opportunity to get their favorite games on Steam.  A select number of the most sought-after titles from the Steam Holiday Sale will reprise their biggest discounts for two additional days.  The Encore Weekend begins at 10am PST on January 5^th (Saturday) and runs until 10am PST on January 7^th (Monday).

A Valley Without Wind 2 brings a vast platforming adventure together with a compelling turn-based strategy game - all within a living, breathing world full of danger and surprises.

Valve introduced the Steam Community Market, now in Beta with Team Fortress 2, allowing players to buy and sell in-game items via Steam.

Valve announced the public release of Big Picture, Steam's new mode that lets gamers access all of their favorite Steam games on a television from the comfort of their sofa.