To celebrate the 15th anniversary of The Elder Scrolls, Bethesda have released The Elder Scrolls II: Daggerfall as a free download. To run this game on newer systems, you will need to use an emulation program like DOSBox (windows version included in the zip). Using DosBox this game is playable on Windows, Linux and Mac.
Daggerfall featured one of the first true 3D worlds on a massive scale, with a game world the size of Great Britain. The game had twice as many features as Arena, a deeper role-playing system, and helped usher in an RPG renaissance in 1996.
Download (from Official Site)
Download (from G4G.IT)