Epic Games this week announced that some players who pre-order Gears of War: Judgment will get three days of early access to the game’s new “OverRun” multiplayer mode. Unfortunately, the deal only applies to gamers who order Judgment from GameStop, either online or in-store.

Those who do pre-order with GameStop will be able to start playing “OverRun” at 3 am EST Saturday, March 16. The early access will run until the launch of the game on March 19. During that time, players can earn XP that will carry over to the full game. The pre-order also comes with a “Young Marcus” character skin and a Lambent weapon skin.

For those who don’t want to order from GameStop, or aren’t sure if they want to buy another Gears title, a demo for the “OverRun” mode will be available through Xbox LIVE on March 19 when Judgment launches. “OverRun” is a new class-based multiplayer mode that pits COG players (soldiers, medics, engineers, and scouts) against Locust players who can take on the role of wretches, tickers, grenadiers, ragers, kantus, giant serapedes, and maulers.