Making, Playing & Publishing Maps - Portal 2 DLC Preview - YouTube
Portal 2 Puzzle Maker Concepts - YouTube
Steam Community :: Guide :: HOWTO Custom Items in Puzzlemaker
Steam Community :: Guide :: Using the Portal 2 Puzzle Builder
Portal 2 Puzzle Maker/Logic Gates - Valve Developer Community
Valve announces Steam for Schools, helps teachers create educational Portal 2 levels | Engadget
Portal 2 - The Cutting Room Floor
Portal 2 "Perpetual Testing Initiative" release date announced | PC Gamer
Portal 2 & Puzzle Maker - WISE
Portal 2 Puzzle Creator : How to Make a Good Test Chamber : 3 Steps - Instructables
Portal 2 : Map Editor Tutorial - YouTube
Portal 2's Puzzle Maker allows users to publish co-op test chambers
ARCHIVED) Portal 2 - Change your custom map textures using Puzzle Maker and Hammer Editor - YouTube
Valve Launches TeachWithPortals « Adafruit Industries – Makers, hackers, artists, designers and engineers!
Puzzle Creator - Portal Wiki
Portal 2 Puzzle Maker: Observation Room - Valve Developer Community
Portal Puzzle Maker helps kids understand "speedy thing goes in, speedy thing comes out" - Kill Screen - Previously
Valve Releases Portal 2 Authoring Tools Beta
Portal 2 Puzzle Creator in internal beta testing now, will use Steam Workshop | PC Gamer
Steam Community :: Guide :: Using the Portal 2 Puzzle Builder
Portal 2 Puzzle Maker #2 | Jack Goodall
Puzzle Creator - Portal Wiki
Portal 2 Puzzle Maker: Deadly Goo - Valve Developer Community
Portal 2 Puzzle Maker #2 | Jack Goodall
