Portal 2 Puzzle Maker: Observation Room - Valve Developer Community
Interview: Valve talks about Portal 2's new puzzle editor - Neowin
Pacing in Puzzle Games on the Example of Portal 2
I think this is not how the puzzle should have been solved : r/Portal
![Cyan TimeSpace Lab [JP․EN] Portal-Like puzzle world with time control and gravity pull (By Udon) - World Showcase - VRChat Ask](https://aws1.discourse-cdn.com/business5/uploads/vrchat/original/2X/c/c23fc55fdb239a822cbf080ed3a9b12bc94d7da0.jpeg "Cyan TimeSpace Lab [JP․EN] Portal-Like puzzle world with time control and gravity pull (By Udon) - World Showcase - VRChat Ask")
Cyan TimeSpace Lab [JP․EN] Portal-Like puzzle world with time control and gravity pull (By Udon) - World Showcase - VRChat Ask
The Entropy Centre' is a first-person puzzle game with heavy 'Portal' vibes
Portal (video game) - Wikipedia
Portal on Steam
![Portal [PC] – Review | My Brain on Games](https://mybrainongames.files.wordpress.com/2015/07/portal-puzzles.jpg "Portal [PC] – Review | My Brain on Games")
Portal [PC] – Review | My Brain on Games
Portal-Like Puzzle Game The Entropy Centre Is Coming To Xbox, PlayStation, And PC Later This Year - GameSpot
Portal 2 Is More Than A Mere Puzzle Game - YR Media
Best games like Portal and Portal 2 for mind-bending puzzles | GamesRadar+
Steam Community :: Guide :: Using the Portal 2 Puzzle Builder
Portal 2 Level 21 | Peatix
Portal 2 on Steam
Portal Chapter 5 (Puzzle 13) - Gamer Walkthroughs
Portal/Chamber 00 — StrategyWiki, the video game walkthrough and strategy guide wiki
Portals | Series Introduction
Portal 2 Puzzle Maker: Reflection Cube - Valve Developer Community
Superliminal is a fun, quirky, Portal-like puzzle game - eCentral Sports
/cdn.vox-cdn.com/uploads/chorus_image/image/1953193/portal_2_pti.0.jpg "Portal 2' puzzle maker now supports design for two-player co-op maps - Polygon")
Portal 2' puzzle maker now supports design for two-player co-op maps - Polygon
Portal 2 Level Design: Creating Puzzles to Challenge Your Players
