- Banned in China: World at War was banned in Japan for "gory violence against Japanese soldiers". It should be noted that the ban was quickly lifted.
- Recycled Premise: The Russian campaign. It reuses a lot of the ideas and themes from previous World War II-era Call of Duty titles, namely the settings of Stalingrad and Berlin, both of which were explored heavily in the first and second games.
- Streisand Effect: World at War became one of the most popular Xbox 360 games in Japan for a time, even though it was officially banned due to what typically happens to the Japanese soldiers in-game.
- What Could Have Been: A lot of cut content has surfaced following the release of the game.
- There was originally going to be a British campaign like previous Call of Duty titles, but was cut due to lack of development time.
- A mission in the American campaign featured piloting an F4U Corsair fighter-bomber against Japanese ground targets and ships.
- In multiplayer, there were maps featuring American and Japanese tanks, complete with models in-game.
- There exists a scrapped training mission in the game's files, which involved landing with LVTs, obstacle courses, and firearms training.
- There was to be a fourth killstreak in multiplayer, each one being unique per nation. In addition, several unused perks have also surfaced.
- According to this article, the Nazi Zombies mode was originally to have been canceled by Treyarch's president due to delays in the game's development schedule, but chose not to and settled by leaving it as an unlockable level once the campaign was completed.
- According to another video, there was originally to have been a fourth Downloadable Content pack released, focused exclusively on Nazi Zombies maps. Development delays for the campaign of Call of Duty: Black Ops however forced the developers to shelve this, and instead release these additional maps for the latter game instead.
Trivia / Call of Duty: World at War