I figured this game deserves it's own "official" thread, so here goes.
For those who don't know, Evolve is the new game Turtle Rock Studios, the developers of Left 4 Dead.
They just released a nice little trailer (no gameplay unfortunately)Evolve will be a co-operative game where four hunter players attempt to defeat an alien monster controlled by another player. Both the hunters and the monsters can use unique abilities during the game. The monster player can kill wild life and other smaller monster and evolve by going into a cocoon stage. The game will take place in a large jungle, where players can take shelter. There is also various power ups that can be taken by both hunters and monsters players.
Edit: Found some gameplay:





