- Actor Allusion: Joe Pantoliano doing the voice of an Italian club owner/pimp? Who knew?
- Dummied Out:
- A character named Darkel was scheduled to appear in the game, before being removed. He would have given Claude a number of missions that would have involved committing acts of terrorism. Contrary to popular belief, he wasn't cut because of 9/11, but some time prior because he didn't fit with the rest of the game. However, pictures of Darkel can still be found on the GTA III website, his voice actor (Bill Fiore) is still credited in the manual, and his missions were either deleted, converted into Rampages, or given by other bosses (El Burro's mission "I Scream, You Scream" being the only known example).
- Another character named Curtly is credited in the manual for the game, although nothing else is known about him apart from his intended voice actor (the late Curtis L. McClarin).
- The large planes at the airport were coded to be able to explode when shot at with the rocket launcher, but it was hastily disabled after the 9/11 attacks happened. Editing the code can allow you reactivate the ability to blow up planes again.
- Fan Nickname: Due to being ordered around for the entire game, before his real name was revealed, Claude was referred to as "Fido". Also, Maria refers to Claude as "Fido" when he is ordered by Salvatore Leone to be her driver.
- Killer App: For the PlayStation 2. Granted, the console had achieved the rare feat of utterly dominating the console market from the very day it was released, but this was the first game to truly show off the system's capabilities, and cemented it as the system to beat.
- Limited Special Collector's Ultimate Edition: Coinciding with game's 10th Anniversary Edition for iOS and Android, Rockstar Games collaborated with Slideshow Collectables and also released a limited edition 1:6 scale figurine of Claude, which featured various weapons from the game (plus a few that weren't or not included), changable hand parts, and his prison jumpsuit as seen in the game's opening cutscene. Only 1,500 units were produced.
- The Shelf of Movie Languishment: It was delayed for a bit while some editing was done due to 9/11.
- Shrug of God: Did Claude shoot Maria? "No one knows for sure what happened there" is the official line.
- Too Soon: After 9/11, Rockstar North changed the paint jobs on the police cars so that they didn't resemble those of the NYPD. Some pedestrian dialogue was also changed and one mission that mentioned terrorism was removed. There was insufficient time between the disaster and publication for extensive alterations.
- Urban Legend of Zelda: Some fans are completely sure that Claude was originally concieved as a speaking protagonist, because of a leftover sound from GTA 2 appearing in a trailer for the game. Rockstar denies that Claude was ever supposed to speak, though.
- There were a ton of rumors about what content had been cut after 9/11, including a persistent one that Donald Love's last mission would have involved crashing a plane into a building, despite Word of God saying that there were never plans for large aircraft.
- Another one was the Maibatsu Monstrosity being driveable.
- And that Fernando Martinez was hidden somewhere in the game and had missions for you.
- Unintentional Period Piece: Inevitably, with the game taking place in October 2001.
- Claude uses a pager (and in some cases, a pay phone box) rather than a cell phone to communicate. On Chatterbox, a Moral Guardians group leader against cell phones calls in to talk about how difficult it is to communicate without them. Both of these elements have been dated past The New '10s with many more people owning cell phones, and even more so by the fact almost every game in the series uses cell phones rather than pagers.
- Liberty City's portrayal as The Big Rotten Apple before 9/11 and The War on Terror. Even though the game was held back a month to try remove content that would look offensive after 9/11, very little had been done to change that.
Trivia / Grand Theft Auto III