Narbacular Drop/en
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This page documents information about a game running on a non-Valve engine, of which the game was developed by a studio whom has since been acquired by Valve.
Narbacular Drop is a game that released in 2005. It was developed by Nuclear Monkey Software and published by Digipen Institute of Technology. Valve later hired the developers to create
Portal.
The official level creation kit is designed for
Hammer 3.4.