Well I'm at the end of the game and I believe I'm on the hard or normal difficulty setting, for whatever reason, when I'm fighting the waves of helgast, after I kill like 5 or 6 of them there's 2 or 3 of them that comes down and no matter how much I knife them or how much I shot at them I just can't kill them, this is crazy, like I've shot at least 150 bullets on them with grenades etc and they still got up and killed me because I didn't had any more bullets, then I tried to knife them, well I knife them at least 15 times and nothing, those godam helgast just come at me and shoot me, this is very frustrating, I'm wondering, am I doing something wrong here, like is there a way to kill those guys ? They just appear to be regular helgast to me, not the actual boss. This is weird.

If its something wrong with the game its on the disc. Because the chances of a bug like this happening numerous times is slim. Usually the next play through after the bug the game will be fine.

I dont know wat you mean

i you talking about when you see the boss and he send los of people to kill you and the geeza that is invisible

No actually it was when he was sending lots of elghast, before you move to the second floor, after like 5 enemies there would be like 2 or 3 invincible elghast that would come down and it was impossible to kill them, for some reason it happen all the time until I shutdown the PS3 and start her up again. It was really weird.
Damn is this last part of the game hard, the difficulty is on hard so it might be the reason why, lots of enemies, its crazy.

that happened to me too, just quit and reload the game

Sounds like a bug to me, I would just restart.

i either solved it by restarting, or by picking the chapter again... i forget which
but yeah i got the same thing. Lemme know if it worked

you supposed to avoid the invisible radek not kill him there

It was a bug, it wasn't Radec, I actually passed the game after I restarted the PS3. Was hard as hell do, especially upstairs, I thought I would've never passed it, those enemies are a bitch to kill, especially on hard hehe. Awesome game btw, not a big fan of the ending but the game was excellent and playing the online multiplayer now, pretty good, out of all the games I've played online this one is one of the best I've played with GoW the original and CODMW.

yess! it is an awsome game =] iv banned myself from playing it until i ge tmy first HD TV for christmas haha