Shout Out / TimeSplitters
The Oblask Dam in the Siberia level of 2 may be a shout out to the Bylemore Dam level of GoldenEye 64. Hardly surprising given that some of that game's devs became Free Radical Design members.
The Chicago level features a bar called O'Leary's.
The Notre Dame level features a hunchback ally.
The Neo Tokyo level from TS2 takes its name from AKIRA, but is intended as a homage to Blade Runner. It has the floating cars, the asian influenced culture, and the the incessant 'Cross Now' from the street signs.
It also pays homage to Neuromancer, as the protagonist of the level, Ghost, is similar to the character Case. His gallery description mentions an AI Core and lists his occupation as a "cyberjock."
Future Perfect features a cyborg monkey that looks suspiciously like a simian RoboCop.
It also has a character that, when selected says " Do I have red on me?"
In What Lies Below, when Cortez checks the files on Crow's computer and the self-destruction sequence starts, an animation appears with Crow wagging his finger and the caption "You didn't say the magic word".
In You Genius, U-Genix, Cortez obtains the ID card of a worker named Dr. Gordon Freeman.
Also In You Genius, U-Genix, A fleeing guard cries "Game over man, game over!" A reference to the film Aliens. An earlier reference to Aliens occurs in "Time To Split", when a space marine is heard saying, "Shoot anything with teeth bigger than its face".
When selected, the Insetik SD/12 says "By Your Command".
Crow's last word is Rosebud.
In the opening mission, at one point a soldier shouts that the splitters are "coming outta the walls! They're coming outta the goddamn walls!" in homage to Aliens.
The Ghost Gun in the haunted house level is a shout-out to , but it acts like the Ghost Dematerializer from Ghostbusters .
Filmation's Ghostbusters The soprano Ear Worm that features through the haunted-house level comes from .
End of Days The Disco Club ending could be reference to a certain third-person shooter that was also made from devs former company.