Portal' writers have a "pretty awesome" starting point for 'Portal 3'
Forget Portal 3! Why We Don't Even Need It (But Think Valve is Crazy Anyway) - YouTube
Portal 3 Gameplay Has an Obvious Direction to Go
I Made Portal 3 Because Valve Wouldn't - YouTube
Portal 2 on Steam
Portal 3 Officially On The Way?
Amazon.com: Portal 2 - Playstation 3 : Video Games
Portal writer says he wants to start Portal 3 because he's 'not getting any younger' | VGC
Voice of GLaDOS urges fans to "email Valve" asking for 'Portal 3'
Why Valve Won't Make Portal 3
Valve Will Reportedly Reveal PORTAL 3 At Tomorrow's Game Awards 2018
Portal writer says he wants to start Portal 3 because he's 'not getting any younger' | VGC
Valve IS NOT DEAD! Portal 3 and Half-Life 3 Could Happen E3 2018 - YouTube
Can Valve's First “3” Be Portal 3? | Gameverse
Valve Mentions Portal 3 In Their New Game - Aperture Desk Job : r/Steam
Portal 3 will have a "pretty awesome starting point," if it ever gets made | VG247
Valve's new game is free, and “not Portal 3” | PCGamesN
It's no 'Portal' sequel, but Valve dropped a trailer for a 'Portal'-adjacent Steam Deck freebie | Mashable
Portal writer says people at Valve like his "pretty awesome" idea for Portal 3 | Rock Paper Shotgun
Portal Writer Urges Valve to Make Portal 3
Valve needs to make Portal 3 soon, writer says | Eurogamer.net
Erik Wolpaw to Valve on Portal 3 — 'we should just do it' | GamingOnLinux
