Getting Started
Everything you need before your first test chamber in Portal 2. New puzzle elements, Wheatley, GLaDOS, gels, co-op mode, and tips for a blind playthrough.
Puzzle Mechanics
Portal 2 mechanics reference. Gel physics, laser redirection, Hard Light Bridges, Excursion Funnels, Aerial Faith Plates, cube types, turret behavior, and advanced movement.
Campaign Walkthrough
Full walkthrough for all nine Portal 2 chapters. Puzzle solutions, boss fight strategy, gel mechanics, and key story moments from the Courtesy Call to the moon portal ending.
Co-Op Guide
Portal 2 cooperative campaign guide. All six courses, communication tools, four-portal puzzle strategies, the Hub, gestures, and the Art Therapy DLC.
00% Achievement Guide
All 51 Portal 2 Steam achievements. Verified unlock conditions, global unlock rates, chapter locations, the Talent Show DLC bug, Professor Portal workarounds, and recommended completion order.
Lore and Story
Portal 2 lore and story explained. Cave Johnson timeline, Caroline and GLaDOS origin, Wheatley as the Intelligence Dampening Sphere, Old Aperture history, the moon portal, and Half-Life connections.