There is a free online game about Garfield (the cat) and a Halloween adventure game....
My granddaughters love the Blue's Clues series of games, The Learning Company games...and many similar ones (educational).
My 7 year old granddaughter loves the puzzle game Elemental which I got online (bought then downloaded it).
The Nancy Drew series is made for an older child but you might try one and see if he likes it and can handle it. You don't see anyone actually getting killed, and I don't remember seeing any dead bodies lying around - so no blood and gore, just problem solving and mystery.
How about Dark Fall? That is one terrific game and if you play it with him you will definitely get him hooked on Adventure games, very spooky, the kind of stuff the kids like. No action scenes, no shoot-em up or anything like that.
Love, Betty Lou
I am 'the HAT lady"! and "who loves ya BABY?!"