The Internet Matlocks are at it again, this time extracting a file from a recent Rock Band DLC pack. While I'm not even sure what would possess you to do this (or better yet, how you would do this), the results appear to be an eye-opening look at some future downloadable content from Harmonix's mega-game.
Included in the list are a number of the previously announced (but not specified) Grateful Dead tracks, as well as the remainder of Nirvana's Nevermind album (which many have anxiously been awaiting). Other selections include more songs from Weezer ("El Scorcho"), Stone Temple Pilots ("Sex Type Thing"), Smashing Pumpkins ("Zero"), and Garbage ("Why Do You Love Me?"), all bands which already appear on the game disc.
After the jump, find a list of songs from the list which have been unannounced, including my attempts at pairing the song names with their likely bands (the file only included song titles). Feel free to let me know if I've excluded anything, or if I've made any errors in song identification.