(This game is in beta, so expect a few bugs here and there). It started out as an experiment with ragdolls and AI, and will remain a slightly experimental, for-fun game project. Ravenfield is a singleplayer battlefield style game.
You can try the free demo to see how it runs on your computer. Ravenfield runs on the Unity game engine, which runs on the following OS: Windows XP SP2+, Mac OS X 10.8+, Ubuntu 12.04+, SteamOS+ Graphics card: DX9+ compatible.