Portal Single Player

Talk about the game, custom maps, how to get the achievements and beat the challenge maps, and anything related to Portal 1. Caution: Spoilers abound!

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Forum Rules and Important Info - Read Before Posting!
by msleeper · Jan 19, 2026
2 Replies · 333 Views
Last post by msleeper
Jan 19, 2026
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What has ever happened to making custom maps?
by Scent Tree Gun · Apr 07, 2019
4 Replies · 4,989 Views
Last post by laganrat
Jun 11, 2020
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Purple+Black fov hands texture Portal 1?
by DerekGrafton · May 14, 2019
2 Replies · 3,079 Views
Last post by Scent Tree Gun
Jan 14, 2020
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Momentum
by Johnnie John Johnson · Jan 07, 2020
2 Replies · 1,892 Views
Last post by Berna2078
Jan 08, 2020
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The feel of portal
by Arachnaphob · Mar 25, 2015
4 Replies · 4,059 Views
Last post by Berna2078
Dec 20, 2019
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Tutorial The Portal Glitch Bible
by Siiig · May 15, 2009
46 Replies · 41,517 Views
Last post by Pookachu
Mar 04, 2019
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Found portal 2005 chapter icons
by MrPLotor · Sep 01, 2017
1 Replies · 2,960 Views
Last post by BenVlodgi
Sep 22, 2017
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Portal Chamber 09, what the heck?
by theVDude · Aug 01, 2009
7 Replies · 6,145 Views
Last post by MrPLotor
Aug 20, 2017
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Why does GLaDOS look different?
by Axon9000 · Jul 11, 2013
19 Replies · 17,541 Views
Last post by Luke18033
May 29, 2017
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Portal Texture Broke
by Bobi · May 17, 2014
5 Replies · 4,043 Views
Last post by User
Jun 06, 2014
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Android Heck
by Joe the Stickfiddler · Nov 11, 2013
0 Replies · 2,802 Views
No replies
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Cool Conundrum results
by Joe the Stickfiddler · Nov 06, 2013
3 Replies · 3,273 Views
Last post by TheTestmasterSphere
Nov 10, 2013
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Running the demo is not helpful!
by Joe the Stickfiddler · Nov 04, 2013
7 Replies · 4,174 Views
Last post by Joe the Stickfiddler
Nov 07, 2013
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Portal DirectX optimization with Portals (For bad computers)
by Chilius03 · Oct 29, 2013
0 Replies · 2,840 Views
No replies
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My portals dosen't look good
by DromEd · Oct 26, 2013
2 Replies · 3,102 Views
Last post by DromEd
Oct 26, 2013
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I am Making a portal 2 E3 mod within Portal 1
by Chilius03 · Oct 19, 2013
4 Replies · 3,550 Views
Last post by Chilius03
Oct 19, 2013
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Unsettling thing in Test 15
by Dafflewoctor · Aug 05, 2013
7 Replies · 6,238 Views
Last post by Axon9000
Aug 17, 2013
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Source SDK 2013 released!
by Fluppy · Jun 28, 2013
6 Replies · 4,750 Views
Last post by ChickenMobile
Jun 30, 2013
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Mods stopped working.
by AD_79p2 · Jun 26, 2013
3 Replies · 3,500 Views
Last post by Axon9000
Jun 27, 2013
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SteamPipe update released - what does it mean for us?
by Fluppy · Jun 25, 2013
12 Replies · 9,477 Views
Last post by SpAM_CAN
Jun 26, 2013
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Can someone make me a portal gun skin?
by edroid999 · Jun 24, 2013
11 Replies · 8,097 Views
Last post by josepezdj
Jun 26, 2013