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A level for the popular HL2 Mod 'Garry's Mod' designed to test all of the then-current source engine technologies in a single map.

The map has undergone several iterations since it's creation in GMod v.10, but has prominently featured a water pool, a small interior and a construction area.

The version of gm_construct currently (August 2011) included with Garry's Mod on Steam is version 2.3.
by Derekk777 August 19, 2011