That means GameStop PowerUp Rewards members be able to access the mode via Xbox LIVE from March 15th to March 18th (before the demo is made available to everyone on March 19th). The offer also applies to eager customers who have already pre-ordered their copy of the game.
OverRun is a new mode in which COG soldiers and Locust face-off in what is being described as "unlike anything 'Gears' fans have experienced yet". Basically, it's an objective-based, which lets players alternate between the two sides. It's also the first time that class-based, competitive multiplayer mode has been available in the Gears of War series.
In addition to early access, customers who pre-order from GameStop will receive a 'Young Marcus' character skin and a Lambent weapon skin.
Gears of War: Judgment will be available exclusively for Xbox 360 on March 19 worldwide.