It's a 5 players asymmetrical multiplayer game. One side has 4 hunters who are reminiscent of the L4D survivors. The other side is a lone monster that has to survive and hunt down the four hunters. Your monster can evolve and adapt to new situations. They have made it clear there is more than one type of monster to fight. So here is the http://www.youtube.com/watch?v=zlaPT08Tmxc. Rock Paper Shotgun has done a http://www.rockpapershotgun.com/2014/02/11/evolve-preview/.
My personal Gamgee take on this? It's just jumped up into my top 10 most anticipated games for sure. I love the hunted mod for source, but always felt it could be so much more. This is that more. It also reminds me of way back in the day when AvP 2 was still super popular some servers had a single predator fighting a bunch of humans. It reminds me of that. Good times. Now however to keep things fresh each creature can evolve. It's such a unique breath of fresh air.