Free-For-All is a new mode to the Gears of War franchise. Previously every mode in Gears of War required you to work in some form of a team, even if it was only a two man team or against AI enemies. Free-for-All seeks to change that. Not much is known about the mode except that it's a ten player match and you are on your own. Any player can kill any other player, regardless of faction (COG can kill COG, Locust can kill Locust).
It has been mentioned that it appears the maps have been hand crafted to be smaller and tighter for these Free-For-All matches, however this has not been confirmed. The fighting is very frantic and death is around every corner, however. Because of this, Free-for-all is being touted as a great method for learning how the game works mechanically. Without the fear of letting down teammates and not having to wait to return to the game after death, you can learn more quickly. It will teach you how to do everything and how to do it quickly so that when you jump into team matches, you can focus on strategy rather than function.
So far, the only map confirmed for this mode is Library.
