Here are a few off the top of my head:
1) Psychonauts - overall just great dialog, but I love the bulletin board. Lots of games have done something like this, but these messages were great
2) Day of the Tentacle - the prior LucasArts game Maniac Mansion, in its entirety, was playable from a computer within the game.
3) Diablo II: The secret cow level - Not the level itself, but the melodic cries of the hell cows. How they made variations of "moo" so aurally compelling is a mystery for the ages.
1) Psychonauts - overall just great dialog, but I love the bulletin board. Lots of games have done something like this, but these messages were great
2) Day of the Tentacle - the prior LucasArts game Maniac Mansion, in its entirety, was playable from a computer within the game.
3) Diablo II: The secret cow level - Not the level itself, but the melodic cries of the hell cows. How they made variations of "moo" so aurally compelling is a mystery for the ages.