Howling is a completely free online multiplayer horror game. It has elements of stealth, horror and action. Fight to survive as the last man standing against your friends.
Here is some gameplay footage showing off playing as a human and a wolf.
You'll see various weapons being used, as well as some tactics in attacking a human/wolf. Parts might be very dark to watch, but that's how it's in the game too (hence the flashlight).
Enjoy!