What is the drug dealer playing in the film Kick-Ass?

Solution 1:

IMDB says it is Call of Duty 4 : Modern Warfare

Kick-Ass (2010)

Razul and his goons are playing this game in the apartment when Kick-Ass enters.

All the transcripts I could find, here 2 sources (PDF file) for movie transcripts, all states he's playing CoD 4

A depressing drug den in which RASUL - 19, cute but wasted - sits playing CALL OF DUTY 4 with some other THUG.

CamelCase (see comment) found that CoD 4 wiki also mention being the game in the movie.

According to the Kick-Ass wikia, trivia section however, he's playing Call of Duty: Modern Warfare 2.

In the movie, Rasul is playing Call of Duty: Modern Warfare 2 on the Xbox 360, in the comics his counterpart originally plays an unnamed Spyro The Dragon game as the bouncer tells Kick-Ass but unlike the movie version, the gameplay for Spyro is not seen on the panel and is replaced with a generic design with a controller parodying Playstation.