A lot of people have actually made predictions to 9/11, long before terrorism became a first world concern. Have you played the original Deus Ex?

"Whenever the New York City skyline is visible in the background, the Twin Towers of the World Trade Center are conspicuously absent. This was due to texture memory limitations that arose during the game's development, but the in-universe explanation for the missing towers is that they were destroyed in a terrorist attack. A year after the game's initial release, the real Twin Towers were destroyed in the 9/11 terrorist attacks."

Spooky. While Deus Ex is a just a fictional game where almost every 'conspiracy theory' is true, it's made plenty of other uncanny references that relate to a lot of real world events.