When you go to Mona's cell in the police station, she is sitting upright. Then the cutscene plays and she is seen sitting hunched over.
In the cutscene where Max first encounters an armed mercenary in the hospital, he draws his gun and the mercenary cocks his gun. After the cutscene ends, Max draws his gun again and the mercenary is seen cocking his gun again.
A .50 AE caliber Desert Eagle holds 8 rounds (7 in the magazine 1 in the chamber), not 10. A semi-automatic pistol can have magazines manufactured for it that can hold dozens of rounds.
In the cutscene where Max finds Annie tied up, you can see that there is no rope or handcuffs restraining her wrists.
At the beginning of the cutscene where Max says, "Throw the rules out the window, odds are you'll go that way too," you can see that one side of the building he fell out of has no wall texture.
With the game's subtitles on, if Max plays the answering machine in Vlad's warehouse, Annie's message displays, "I'm not here right now cause I'm building some nasty things that kill." The word "cause" is missing an apostrophe in front of it.
In the cutscene where Mona flees Max's apartment, his mouth does not move when he yells, "Wait. Mona!"
The police station's lockup has no toilets or sinks.
While in the derelict building as Mona, a number of signs display the word "authorised", spelled in UK English, even though the game takes place in the United States.