Just watched TB's review of the game and the game graphics do look really terribly optimized, and there's obviously some bugs with it. That being said, TB is pretty fucking bad at video games. He claims (just after the 5 minute mark) to get mysteriously killed. But just before that, as he's running up the hill, you can see an enemy/tribesman up to the right of his screen. And when he dies you see a tribesman standing over him. He clearly got killed from the back. He loads back up and then see's a tribesman attack him and he gets destroyed, and complains that "70% Health apparently isn't really 70%". Maybe he's used to games where you can tank 5+ hits from enemies, I'm not a big fan of those types of games. I'd rather have a game punish me for making mistakes than to hold my hand throughout the whole thing.
I like games that are "hard". That being said, the combat looks fucking terrible (aside from sneaking up on people).
I think the game had a lot of potential (on paper), but watching it being played, it just looks like a terrible game.