Everyone loves free stuff, and we have not one but two PC games that you can get for free for a limited time. One is Metro 2033, the 2010 released post apocalypse first person shooter set in Moscow from developer 4A Games and publisher THQ.
All you have to do is "like" a THQ page on Facebook and you will receive a code to download Metro 2033 via Steam. The codes will be given out "while supplies last" and is a way to help promote the upcoming sequel, Metro Last Light. Normally, Metro 2033 is listed at $19.99 on Steam.
The other free game is Duke Nukem 3D, the still highly entertaining 1996 first person shooter from developer 3D Realms. From now until Friday, you can get the game, in both PC and for the first time via Mac OS X, for free on the GoG.com web site. This is the Atomic Edition of the game, which has the original game and the Plutonium expansion pack.
GoG.com has also started its annual holiday sale, with special deals every day until Christmas. The first deal lets users get eight games from developer Bullfrog, including Syndicate, Dungeon Keeper and more, for 50 percent off their normal price for each game or 75 percent off if you get all eight in one bundle.