Construct
From Halopedia, the Halo wiki
Template:Multiplayer Map Infobox
"Construct"[1] is a map referenced in the Halo 3 Beta code. As such, its existence is not confirmed, nor are any of its characteristics. Since there are no obvious ties in its name to any previously seen map, it is likely to be completely original.
It appears to be a confirmed in a leaked sceenshot.[1]
References