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Populære Steam-guider Skrevne guider, referencer og walkthroughs
FIX for Achievements that did not unlock
af Calmly Frenetic
What to do when completed Portal achievements don't show as unlocked on Steam....
Все достижения в Portal
af ProOldRaven
Гайд по получению всех ачивментов в количестве пятнадцати штук. Видео и разъяснения прилагаются....
Weapon Cheats Guide!
af 
This guide will suprise you of how many weapons there is in Portal! You will need to know how to open up the developer console....
Screenshots of radio: Test chamber 00 - 19
af Captain foxy
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Прохождение бонусных карт на время
af Extragamer
Для того чтобы выполнить эти 3 достижения в Portal: 1)Основы науки - Закончить все испытания с бронзовыми медалями. 2)Настоящий учёный [/...
Least Time Challenges
af Jimo
I will demonstrate how you can complete all of the Least Time challenges in Portal to work towards the Aperture Science Achievement....
Прохождения бонусных карт на кол-во шагов
af Extragamer
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The advanced chambers (glitches and shortcuts)
af Xorven
There's a little guide about the advanced test chambers. Achievements to unlock : Cupcake - Fruitcake - Vanilla crazy cake Good viewing ! ...
Complete Walkthrough
af Mach1ne
The Complete Walkthrough of the game in about 45 minutes....
Least Steps Challenges
af Jimo
I will demonstrate how you can complete all of the Least Steps challenges in Portal to work towards the Aperture Science Achievement....