GoG.com
Currently in public beta and boasting a growing selection of games from years past, GoG (short for Good Old Games) will launch for real in 2009. What sets GoG apart from the rest of the crowd is its focus on classic games, such as Fallout, Unreal Tournament, Sacred, and more, all offered up for low prices ($5.99 to $9.99) and without digital rights management (DRM) that might prevent you from enjoying them years from now. Many games also include extras such as a PDF manual, icon art, wallpapers, MP3s from the game’s soundtrack, and more. Your account also serves as a social network, putting you in touch with hundreds of other classic game fans.

From now through 11:59 p.m. EST on January 3, almost every single game in the GOG.com is on sale. Deals range from 25% to 40% off on each game that wasn't released in December, with those games not being apart of this deal. That still leaves 171 games to be discounted on top of the normally cheap prices on GOG, including Duke Nukem 3D ($3.89), Psychonauts ($7.49), Evil Genius ($6.99), both MDK1 and MDK 2 ($7.78), Fallout and Fallout 2 ($3.89 each), and plenty more.