Six Days in Fallujah (SDiF) is an unreleased historical third-person shooter video game that was developed and left unreleased by Atomic Games. It's said that it was going to be the first game to focus directly on the Iraq War (which was still ongoing at the time). Konami was going to be the original distributor.
The player gets to play an American infantry soldier to fight off terrorists during the infamous Battle of Fallujah.
Why it was Cancelled (or put on hiatus)
After the game was announced, it was met with criticism from both British war veterans and from Stop the War Coalition, a British anti-war organization.
Reg Keys, who lost his son, Thomas Keys issued a statement that “Considering the enormous loss of life in the Iraq War, glorifying it in a video game demonstrates very poor judgement and bad taste... These horrific events should be confined to the annals of history, not trivialized and rendered for thrill seekers to play out... It's entirely possible that Muslim families will buy the game, and for them it may prove particularly harrowing. Even worse, it could end up in the hands of a fanatical young Muslim and incite him to consider some form of retaliation or retribution.”
In response to the controversy, Konami decided to not be involved in the project. The game also hasn't found a new publisher yet and the game is highly unlikely to be released due to the controversy.