Grid (Forge Item)

A Grid is a Forge Item introduced in Forge World of Halo: Reach, but is also in Sandbox of Halo 3. It loooks like a blue coordinate grid acts like another floor, or a ceiling. Players can walk on it, forge on it, land vehicles on it, anything.

Halo 3
The Grid on Sandbox is high above the map and players can also forge on it.

Halo: Reach
The Grid makes a return in Halo: Reach and is now a forge item that can be created from the items list. The Grid costs $100.