He's probably referring to Corpse Party. It's only available in Japanese on iOS though (there's an english version on the PSP)
Modern Combat has blood and body parts ripping off and one close up scene with knifing to the neck, but I'd still say Dead Space is more violant.
That IS the one I was talking about. Also it was a legit question, I am not familiar with the game so I have no idea if it is *more* violent (or gory or whatever).
I've played the English version on PSP. It's not so much violent and gory as just overall creepy and full of dead people/ghosts.