October's Origin On the House game is Dragon Age: Origins and is available for you to claim and download from their site immediatly. You can get it here.
What is Dragon Age: Origins?
Dragon Age: Origins is a role-playing video game developed by BioWare's Edmonton studio and published by Electronic Arts. It is the first game in the Dragon Age franchise. The game was released for Microsoft Windows, PlayStation 3 and Xbox 360 on November 3, 2009, and for Mac OS X on December 21, 2009.
Set in the fictional kingdom of Ferelden during a period of civil strife, the player assumes the role of a warrior, mage or rogue coming from an elven, human, or dwarven background who must unite the kingdom to fight an impending invasion by demonic forces. BioWare describes Dragon Age: Origins as a "dark heroic fantasy set in a unique world," and a spiritual successor to their Baldur's Gate series of games, which took place in the Forgotten Realms Campaign Setting of the Dungeons & Dragons franchise
Some more information about Origin On the House:
Free?! What's the catch?
There's no catch. Grab full games, expansions and more at absolutely no cost. Just make sure to act fast because On the House specials can appear and disappear at any time.
You mean a trial or demo, right?
Nope. You’re getting a full version of the real game — for free!
How long will I own the game?
Once you’ve claimed your game, it’s yours to keep!
Why is Origin doing this?
Our goal is to provide a great gaming experience and a way to discover awesome new games. Having a game in your library, for free, is a fantastic way to see what Origin is all about.