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TWP Competition Pack - ReleaseIn News and Announcements · 1 week ago

Help with VTFEdit(Nems Tool) Runtime installsIn Hammer and Modding · 2 weeks ago

Account deletionIn General Off Topic Discussion · 2 weeks ago

Judging for the fifth mapping competition is now finishedIn News and Announcements · 3 weeks ago

Download categorization and missing filesIn General Off Topic Discussion · 3 weeks ago

Purple+Black fov hands texture Portal 1?In Portal Single Player · 9 months ago

MomentumIn Portal Single Player · 1 month ago

Hard Light entity helpIn Hammer and Modding · 2 months ago

Towering Competition Deadline is overIn News and Announcements · 2 months ago

TWP Mapping Competition, Winter 2019 - Win up to $50!In News and Announcements · 2 months ago

A Lord of the Rings theoryIn General Off Topic Discussion · 2 months ago

Welcome to the new Thinking With PortalsIn News and Announcements · 2 months ago

Spam Cleanup and User RegistrationsIn News and Announcements · 2 months ago

The feel of portalIn Portal Single Player · 5 years ago

Call to action: Looking for writers, authors, and moreIn News and Announcements · 2 months ago

The Off-Topic ThreadIn General Off Topic Discussion · 8 years ago

2018 Thinking With Portals Mapping CompetitionIn News and Announcements · 1 year ago

[SP] The RevisionIn Community Releases · 4 months ago

[SP] Pressure CubeIn Community Releases · 5 months ago

Thinking.WithPortals 2019 'Summer' Mapping CompetitionIn News and Announcements · 8 months ago

Entities are missing in mapIn Hammer and Modding · 7 months ago

[SP] Brain DonutsIn Community Releases · 7 months ago

[SP] OdysseyIn Community Releases · 7 months ago

Any way possible to change the default PTI music in Hammer?In Hammer and Modding · 7 months ago

DOWNLOAD LINKS ARE BROKENIn General Off Topic Discussion · 8 months ago

Faceposer Scene Creation Help (+Crash)In Hammer and Modding · 10 months ago

[PTI] Apocalyptic Testing InitiativeIn Community Releases · 8 months ago

Should we sign a petition to make Portal 2 free?In General Off Topic Discussion · 9 months ago

Dubbing project of Portal 2In Portal 2 Single Player / Coop · 9 months ago

Upload helpIn Hammer and Modding · 8 months ago

Vectronic (Playable Demo Available)In General Off Topic Discussion · 5 years ago

Regarding messing up the logic_choreographed_scenesIn General Off Topic Discussion · 9 months ago

[SP] Exhaust StationIn Community Releases · 1 year ago

Epic Introduction ThreadIn General Off Topic Discussion · 12 years ago

Coop mod course in hubIn Hammer and Modding · 9 months ago

[Coop] Dependent cubesIn Community Releases · 9 months ago

[PORTAL 2 MOD] Aperture Apocalypse Now Hiring!In Hammer and Modding · 9 months ago

Single player hubIn Hammer and Modding · 2 years ago

question about map loading with console commandsIn Puzzle Creator and Workshop · 10 months ago

Try Anything TwiceIn Community Releases · 9 years ago

Glass breaking and destructionIn Hammer and Modding · 10 months ago

Modding crew!In Hammer and Modding · 10 months ago

For Old Times SakeIn Community Releases · 7 years ago

What has ever happened to making custom maps?In Portal Single Player · 11 months ago

[SP] Hyperdimension Nep TestIn Community Releases · 10 months ago

[Coop] Yandere TestIn Community Releases · 10 months ago

[SOLVED] Lighting Glitch: Textures Appear BlackenedIn Hammer and Modding · 11 months ago

[Tutorial] The Portal Glitch BibleIn Portal Single Player · 11 years ago

[Solved] Custom Textures Discolored & Have Tiled OutlinesIn Hammer and Modding · 12 months ago

Aperture Science IBM 5150 3D modelIn Community Releases · 1 year ago