- 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.
- What Could Have Been: according to the developers. Rage was intended to be have five or six smaller wastelands rather then two large ones, at least with the overall memory size, but it wound up being cut down due to consoles much more limited storage space(the 360 version already had three discs and the PS3 struggled to fit everything on just one disc) With each new DVD, the distribution costs rise even higher per unit, so iD Software was forced to restructure the game's content to fit within three DVDs for the Xbox version and one for the PS3 version. It should be noted that the developers clarified that no content was actually cut from the game , as the content that was supposed to be in the other wastelands was integrated into the two wastelands that made it into the final game.
- 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.