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Problems with Portal Funneling?In Hammer and Modding · 17 years ago

Portal Camera Jumping BugIn Portal Single Player · 18 years ago

Aperture Science Pin up drawingIn General Off Topic Discussion · 17 years ago

maps with multiple paths?In Hammer and Modding · 17 years ago

Portal Custom Maps QuestionsIn General Off Topic Discussion · 17 years ago

Playing self_esteem_fund sound fileIn Hammer and Modding · 17 years ago

Portal Life TrailerIn Hammer and Modding · 17 years ago

Triggering soundIn Hammer and Modding · 17 years ago

Valve Confirms More PortalIn News and Announcements · 17 years ago

Glados Custom VoiceIn Hammer and Modding · 17 years ago

force field propertiesIn Hammer and Modding · 17 years ago

404 DOWNLOADSIn General Off Topic Discussion · 17 years ago

Removed? (NEVERMIND)In Hammer and Modding · 17 years ago

REQUEST : Must-Play map list, with download linksIn General Off Topic Discussion · 17 years ago

Button lights?In Hammer and Modding · 17 years ago

You guys made me do it + Support system activeIn General Off Topic Discussion · 17 years ago

With more portal coming... what to expect?In General Off Topic Discussion · 17 years ago

Strange portal behavior (player passing through walls)In Hammer and Modding · 17 years ago

Is Hammer crazy or is it me?In Hammer and Modding · 17 years ago

Safe ceiling squat portals?In Hammer and Modding · 17 years ago

Hammer not updating maps after they are compiliedIn Hammer and Modding · 17 years ago

WANTED: some more semi-official signage!In Hammer and Modding · 17 years ago

Sprite won't show upIn Hammer and Modding · 17 years ago

[WIP]Aperture Secondary Labs - Room 1In Hammer and Modding · 17 years ago

Help with fire rings and clear tubes pleaseIn Hammer and Modding · 17 years ago

Hi, noob questionsIn Hammer and Modding · 17 years ago

Decompiling textures and soundsIn Hammer and Modding · 17 years ago

New types of fizzlers : doable?In Hammer and Modding · 17 years ago

Toggling a brush's visibility?In Hammer and Modding · 17 years ago

[WIP] posting a map?In Hammer and Modding · 17 years ago

SDK beta has source code for MODS!In Hammer and Modding · 17 years ago

RadioIn Hammer and Modding · 17 years ago

SwitchesIn Hammer and Modding · 17 years ago

Glass frames?In Hammer and Modding · 17 years ago

Reactivating TurretsIn Hammer and Modding · 17 years ago

Would Portal TFC be cool?In General Off Topic Discussion · 17 years ago

Easter Egg - DEBUNKED (Spoilers!)In Portal Single Player · 18 years ago

Help: Combine soldiers actually shooting.In Hammer and Modding · 17 years ago

Entity concept but too newbie to do it. Help!In Hammer and Modding · 17 years ago

Are original maps de-compilable?In Hammer and Modding · 17 years ago

Audio filesIn Hammer and Modding · 17 years ago

HOLY SHIT GUYS, PORTAL WAS RELEASED!!!In General Off Topic Discussion · 18 years ago

where be my crosshairsIn General Off Topic Discussion · 17 years ago

Valve should Balkanize the challenge map AchievementsIn Portal Single Player · 18 years ago

New Spotlight - SnakepitIn News and Announcements · 17 years ago

Floor lighting physically causing leaks.In Hammer and Modding · 17 years ago

Phantom BrushesIn Hammer and Modding · 17 years ago

Hi I'm new - have a map concept would like some inputIn Hammer and Modding · 17 years ago

How to force doors to close?In Hammer and Modding · 17 years ago

snakepit speedrunIn Hammer and Modding · 17 years ago