The game is actually quite awesome. Basically the goal is just to rack up as many points as you can by scaring the shit out of the other bears, torturing them, or just straight up massacring them. You can be stealthy, set up traps, or just go all out Schindler with a weapon.
There are 7 main episode missions and 5 sub-missions for each episode. The sub-missions have various goals like "drive everyone insane", "never get hit", "time trial", etc. Each level can take 15-40 minutes depending on how you are playing.
The gameplay can get a bit annoying after a while, but the deaths and the way the AI works in this game is hilarious once you start driving the bears insane. The death animations are all great as well, seeing a cute teddy bear gut itself with a knife or shoot itself in the head and watch their fluff come out is very satisfying.
Of course, it is not all positives. I've had a lot of issues where enemies would just freeze in a spot and would not get scared or move, this is an issue when you get to missions where you cant hit the bears as it is the perpetual game over. Also, on a couple of longer missions, I got to the end, and the freaking game froze. Each mission is three parts (tutorial part, middle part, boss part). There are NO checkpoints, so if something bad happens, you start all over at the beginning, which gets really annoying if you're set out after a special goal.
The achievements are all pretty easy to obtain eventually. Overall i'd probably give this game a 6. For what it is, its pretty great, but I think it could've been a lot better, and probably should've been a $30 game. For now, i'd say just rent it.