If you know that qbert, pacman, donkey kong and tapper are older games from the 80's and they have characters unique to each game, then your fine. Some more recent games also are in it like street fighter, mortal kombat, sonic, mario, house of the dead, dungeons and dragons, ect... The things happening to the characters is pretty universal/generic. The movie mainly centers around 2 fictitious games. So no specific knowledge is needed.