DLC map packs added two maps, Foundry and Sandbox designed to take advantage of this feature allowing free reign to create your own map using building blocks.
This is also the first game in which the custom 'Grifball' game type variant (a custom version of Assault with players spawning with Gravity Hammers and an Energy Sword) would be seen in the series, which would later become included as official game variants in later games in the series. An awesome multiplayer mode, with many new multiplayer game modes such as Infection and VIP.Awesome graphics that are extremely detailed, and even for Xbox 360 standards.