Oh my gawd, @darth-azrael, don't even get me started on the colossal number of screw-ups when it comes to representing the Man of Steel in video games.
The Death and Return of Superman has a Kal-El so de-powered that ordinary punks can kill him in the first stage before you even reach Doomsday.
I repeat: ordinary punks can punch Superman to death. No Kryptonite Knuckles, no magical enchantments, just normal humans going toe-to-toe with The Man of Steel. There are nowhere near enough facepalms in the galaxy...
He was probably just a little weak from dying... :)
No, dude, this is before the fight with Doomsday. He ain't even been dead yet! :D