Need some help in Sin Episodes:Emergence

[Borden]

***Spoiler Warning***

So i'm a bit stuck at the part where you meet the very attractive big monster thing, the one with the huge boulder-like fists. I jump out of the tunnel and see him land, hear the radio transmission telling me to use the plasma thing on the magnum. I use that up but then the monster thing is still alive I then carry on shooting him/her with my shotgun but he doesn't die. By that time i have no life and end up getting killed to death from him pounding into me p)

Anyone like to share any hints/tips?

BTW, did anybody else get scared by the mutants? They remind me of the trigens in FarCry

Cheers

 

[Borden]

Thanks for the replies, i think i'll go right and give him further to chase me. I've tried topping up on health but i end up getting stuck there with him hitting me.