During the Microsoft Press Conference at E3 2012, one of the trailers that was showcased was Gears of War: Judgement. Confirmed by Gameinformer, there will be a new online mode called OverRun.
According to GameInformer,
OverRun consists of two timed rounds, allowing each team to play an offense-based Locust round and a defense-based COG round. When playing as the Locust horde, you’re tasked with breaching two sealed emergence holes before finally destroying the COG power generator. These emergence holes are placed one after the other, so you’ll be destroying them in sequence rather than choosing between two simultaneous objectives. Once you’ve destroyed the seal of one of these holes, the COGs are annihilated by a Kryll storm and your team gains a new spawn position. Several minutes are also added to the timer, giving your team more time to make the final push towards the generator. Scoring is determined by how many objectives the Locust complete, with a maximum of three points awarded if they manage to open both emergence holes and destroy the generator before time runs out. In the case of a tie, the team that completed the tasks in less time gets the win.
Enjoy the trailer.