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, lasers, Hard Light Bridges, Excursion Funnels, Faith Plates, cube types, and advanced movement.
Campaign Walkthrough
Full walkthrough for all nine Portal 2 chapters. Puzzle solutions, boss strategy, gel mechanics, and the story beats from start to finish.
Co-Op Guide
Portal 2 cooperative campaign guide. The Calibration Course and all five numbered courses, four-portal strategies, the Hub, gestures, and Art Therapy.
00% Achievement Guide
All 51 Portal 2 Steam achievements with unlock conditions, chapter locations, the Talent Show DLC bug, and Professor Portal workarounds.
Lore and Story
Portal 2 lore explained. The Cave Johnson timeline, Caroline and GLaDOS, Wheatley, Old Aperture, the moon portal, and Half-Life connections.
Tips and Tricks
Portal 2 tips covering crouch-jump clearance, sv_cheats tracking, gel identity, funnel shortcuts, co-op gesture unlocks, and the Professor Portal partner rules.
Troubleshooting and Platforms
Fix Portal 2 crashes on Linux and Steam Deck, the No Steam logon co-op error, corrupted saves, and controller glyph bugs, plus macOS and Switch support.