Q*bert is an minor character that appeared in Sonic For Hire: Robotnik. Sonic just wrapped up a job with him setting all tiles in the same color but as soon as Sonic left Q*bert steps on two tiles that change color and says, "Oh fuck." Sonic claims that Q*bert has OCD and that he should take his meds to feel normal for a while. He made a cameo in Sonic For Hire: It's On where he was at the Tapper.
Q*Bert was also briefly mentioned at the end of The Creator . Sonic states that he's bored about being god and tells Tails to call up Eggman and Jim so they can go and fuck up Q*Bert's pyramid house.