Bought it on sale, 2 days, deleted it off my HD about a minute ago, fuck this game.
Its complete bullshit, arbitrary difficulty, you'll have a good little run going and then the game just fucks you, it poisons entire areas, you're starving and anything you kill becomes toxic the second it hits the floor, nothing but the worst females to breed so you get one pack member and very little in the way of stats carried over, even if you happen to make it very far you're still super fucked when the cavemen as they OHKO and you can't even eat them if you bring them down.
I don't care if I die because I'm a moron or played like crap, but anything beyond my control like that toxicity crap or emptying massive areas of anything edible and forcing me to got through it is just nonsense.
Its 2013 and I'm mad at a videogame, way to go me. Avoid this piece of crap.