TBH. i played the game when it was first in EA and then finished the ending when they added it in later. I kinda dont even remember what happens :P

Last level was a hell for me, every time i died i got respawned in the middle of air with all weapons on screen simultaneously. If i load last save from menu it was the same. Quick saves also got that problem. Later on that level when you got infinite ammo i died on the next floor and spawned with limited ammo against endless waves etc...
Dunno if it was my "luck" but anyway game is boring and that game design...complete mess of everything. Like you got a bacon, candys, some fruits and whiskey in one plate, tasty products by themself but in a mix its

I enjoyed the game but the voice acting got boring after a little while for me