Developed from ground up by a pair of brothers (yes, the engine is home-grown as well), Miasmata is a first-person survival/adventure game set on a remote island named Eden. Here, you get to play a plague-stricken scientist on a quest to save himself from uncertain doom. Needless to say, the island isn't a very friendly place and, as you can see from the video, is home to dangerous animals. Heck, there's one in particular that's apparently going to be rather adamant about stalking you down to devour you.

You can read up more about it on their Steam Greenlight page here.