Mark Chapman and other lags are allowed access to PlayStation and Xbox games.

And the evil killer will be at the front of the queue this week when Attica Prison in New York takes delivery of hot new title Beatles: Rock Band. Chapman, 54, shot Lennon four times outside the star’s New York home in 1980 after the Beatle had signed an autograph for him.

A prison insider said: “He’s allowed the same perks as any other well-behaved prisoner. But it’s sick to think of him sitting in his cell mimicking the Fab Four.”

Jay Todesco, of Prison Watch USA, said: “It makes a mockery of justice. I know prisoners have rights to entertain themselves but this is stomach-churning.”

Jessica Clark, from prison watch group Justice Monitor, said: “It’s disgraceful Chapman should be imitating the man he murdered in a video game.”

Chapman is serving 20 years to life and has already been turned down twice for parole.

He’s eligible to apply again next year.