i got through it.... heres what i did so you people can use this technique....
I left the tridgen at the top, and jumped off into the dam.... After I jumped off, the fat boys and tridgens detected me, so I ran off shore to a hill RIGHT on top of the water (small hill, its not hard to get up there)... The Fat Boys are so freakin dumb that they start to run into the water to get me, of course fat boys forget that they cant swin, so they drown.... I had about 3 or 4 fat boys run into the water and die.... the fifth one was running out of the water and got stuck behind a dead fat boy floating in the water, so I just ran for it (oh, a tridgen was also stuck behind another fat boy... I swear i could have stood there for an hour and they wouldnt come and attack HAHA!!)
At last I made it to the helicopter, and voila! take that minigun and start killing those mutations!!!
thanks for the tips guys....
EDIT: Oh, and I DIDN'T CHEAT!!! And I beat the game....
Does anyone know if a Far Cry 2 is supposed to be coming out? I did post a cryengine 2 video, but someone on another forum said that it wasnt for far cry... i dont buy that... If you go on IGN and search for Far Cry, you will get a result saying Far Cry Expansion Title for PC and a few other Xbox (and 360) games.... anyone have info on these?