Recently, I've came across some neat titles on Good Old Games.com... in short, it's similar to STEAM in that it allows games to be bought online and downloaded after payment... the difference is that the games are downloaded as an installer without Digital Rights Management(DRM), and thus, you can play the games, without the use of CDs/DVDs and even keep it aside for future uses, or share it with your friends.
The games sold on GoG.com are also old games... games that you probably played in your childhood... or maybe like me, with a crummy computer, and could only wished to play in your childhood but never did... well.. here is your chance! The games sold on GoG.com are fully compatible with even Windows 7 (32/64bit) without the need of an emulator/virtual machine.. so yeah its really simple ^^x... buy, download, install and enjoy!
There is currently a holiday period sale, and being the RPG geek I am, I've bought...
Myst: Masterpiece Edition (USD $4.19)
Riven: The Sequel to Myst (USD $4.19)
Baldur's Gate: The Original Saga (USD $9.99)
and yes, there are many other genres besides RPG, like Duke Nukem 3D, Heroes of Might and Magic 3, Moto Racer, Descent 1+2 and more ^^x