The Elder Scrolls II: Daggerfall

The Elder Scrolls II: Daggerfall is, literally, one of the biggest video games ever created. The game map measures 487,000 square kilometers, where you can find more than 15,000 perfectly explorable cities, towns, and dungeons.

The gameplay corresponds to the classic of the saga, with a first person perspective from which you can fight against your enemies and talk with the more than 700,000 characters that inhabit the game's universe.

One of the most outstanding things about Daggerfall is that, though it is a RPG, you can buy up tons of properties and have both houses and boats (the later are especially useful if you need to travel from one place to another).

The Elder Scrolls II: Daggerfall is a mammoth game, which no fan of the role-playing games for PCs should miss. Particularly bearing in mind the fact that it's free.