Several maps from Halo: Combat Evolved and Halo 2 have been subsequently remade for Halo 3. These include:
- Blackout: a remake of Halo 2's Lockout
- Heretic: a remake of Halo 2's Midship
- Last Resort: a remake of Halo 2's Zanzibar
- Cold Storage: a remake of Halo: Combat Evolved's Chill Out
Additionally several previous maps have been tweaked or "re-imagined": Avalanche is a re-imagination of Halo: Combat Evolved
's Sidewinder and Valhalla is one of Halo: Combat Evolved
's Blood Gulch and Halo 2
The game is referenced in the season finale (both episode 8 and 9) of the first season of the 2008 US TV series Terminator: The Sarah Connor Chronicles. Especially in Episode 8 it is in view for about one minute.
There's a number of Hollywood actors who lend their voices to supporting characters in Halo 3, none more interesting than the team from Red vs Blue, who provide a comical moment during the second main mission of the single player campaign. You'll hear two of the well known voice actors from the online show arguing over a 'let me in' moment by a doorway and, depending on the difficulty setting, the voice overs change.
Other notable additions to the cast include three members from the hit TV series Firefly, namely Nathan Fillion, Adam Baldwin and Alan Tudyuk.