In the scene where Hit-Girl first assists Kick-Ass, what is the drug dealer playing?
You only get a few seconds to see the game on screen.
The game is split screen (in the screenshot below, the red bar is the border of the top player, who has been killed in-game).
There are numerous clips on youtube if you don't have the film.
I have tried googling the game name but anything with
game just gives me the Kick-Ass game as opposed to the game in this clip.