Thread:Deathstalker666/@comment-1915529-20120712125232/@comment-1496755-20120905162413

Commander Keen, for example - it has a whole section that explains the life and peculiarities of the planet where the action takes place (e.g. Mars). And it's pretty detailed :)

The first Dune game has a book accessible from the UI that explains a lot of lore-related things - useful for people who haven't read the book or watched the movie. And new pages appear as the story progresses.

Diablo has a system of books that appear in certain levels, which tell you stories about the series background. There are 3 possible sets of books - randomly chosen every time you start a new game.

Doom 3 has something similar - the PDA. The various e-mails and audio logs can tell you a lot about the background story. It's good that they added this feature, otherwise the game would have been really boring (considering the quality of the monster fights).

Statistics is another cool feature I like seeing in a game. X-Wing and TIE Fighter have special statistics logs that tell you how many enemies you have destroyed (and how many of each type), what your shooting accuracy is, what rewards you've earned, etc. :)