Gears of War 2

- if you play the entire main campaign in co-op, there will be special cut-scenes and decisions that will affect the game various endings.

- Different difficulty settings for each player in co-op

- the length of the campaign will be around 15 hours

- a new stamina bar will determine for how long your character can run and fight, the lower the stamina, the worse your performance will be.

- a new boss called "acheron" revealed. it looks like a gargantuan mammoth that the locust use in order to destroy large vehicles

- new multiplayer mode called "ordeal", it's a mission where you compete to see who kills 100 enemies first.

- new multiplayer mode called "en-garde", chainsaws only!

- notable graphical improvements in terms of lighting and amount of enemies on screen.