I found this game because I googled building survival games. After watching the video at the start it didn't seem that cool however I tried it and I died like on the second day because I had no idea what I was doing. I played again and started realizing how to play its actually pretty fun. It has a free demo but i'll probably buy the full version because I just beat the demo. It also has multiplayer, but for the demo you can only play the building game mode.
So basically what you do is build up a base to fend of monsters at night time, however your only real food supply is wheat and the monsters will either try to kill you or go for your wheat. You want to defend both. The game also has boss battles and so far after finishing the demo I've only seen two, the bosses were varied so far and I enjoyed fighting them.
I actually don't know a whole lot about the game at this point because after looking at some of the pictures of the full game there seems to be a lot more features.
Here's the picture gallery on the website:
http://buildanddefend.com/screenshotsAnd the main page:
http://buildanddefend.com/I'm going to get it tomorrow because i'm about to go to sleep, if anyone else decides to get it, want to play multiplayer?
Also its only $5.