Casting Gag: Id has gone on record of saying that they hired John Goodman due to Dan Hagar's visual similarities to Walter Sobchak.
Science Marches On: The game's backstory has most life on Earth wiped out by the impact of 99942 Apophis, a 330-meter asteroid discovered in 2004 and then determined to have a decent chance (1:37) of hitting Earth in 2036. Since the game came out the impact odds have been revised significantly downward, to the point where NASA no longer considers it a credible threat: it's most likely going to miss us by roughly a third of the Earth's orbital radius.
Keep Circulating the Tapes: Both the original novel and the omnibus collection (The Bachman Books) that it was part of are out of print. However "The Bachman Books" has been released as an e-book, Rage is not available as a stand alone book.
Old Shame: Subverted by King. He's not ashamed that he wrote the book, but he did request it be pulled out of print because of a handful of school hostage situations and shootings that were inspired by it. He's simply realistic and understandably feels that preserving the full integrity of his writing isn't worth the lives people who were inspired by the book have taken.
What Could Have Been: In the ending to the original manuscript, Ted dies (though no changes to how his classmates torment him, and he is left in the same state as the revised ending before we move onto Charlie's fate); Charlie is convicted of the killings, in addition to Ted's death. These changes, though thankfully changed, serve no justice for either character though, sadly, because no hope of Ted's condition of improving and Charlie is still busted.
Limited Special Collector's Ultimate Edition: Various albums have limited edition digipack releases. Limited edition of Black in Mind however, came with second disc which featured both Avenger releases. This is currently the only official appearance of those releases on CD.
Name's the Same: They dropped the name Avenger because there already was a NWOBHM band with that name.
Old Shame: Their releases as Avenger, due to outrageous lyrics on some of the songs ("Battlefield" and "South Cross Union" being the worst offenders).