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all easter eggs in portal
av AnthoChainSaw
...
Portal - Guide des succès
av Shiryu™
Guide pour réaliser les succès ! Ma chaîne Youtube ...
Passage game +getting all achievements
av TroLL
This guide provides a video course pass of the game, as well as the passage of challenges and advanced maps. Also along the way you will find out what achievements you can get....
Прохождение игры +получение всех достижений
av TroLL
...
Least Steps Challenges
av Jimo
I will demonstrate how you can complete all of the Least Steps challenges in Portal to work towards the Aperture Science Achievement....
Все достижения в Portal
av |ERP|ProOldRaven
Гайд по получению всех ачивментов в количестве пятнадцати штук. Видео и разъяснения прилагаются....
Transmission Received Achievement
av lonerunner | tradeswap.ga
This guide is intended to help you easier find all transmissions and set them to their final location where they should receive transmission....
All the challenges
av Xorven
In this place, there are the videos and the objectives of Portal challenges. Achievements to unlock: Basic Science - Rocket Science - Aperture Science Practice is required to earn these achievements. Good viewing ;)...
Least Portals Challenges
av Jimo
I will demonstrate how you can complete all of the Least Portals challenges in Portal to work towards the Aperture Science Achievement....
Console Commands, Trick for challenge maps, Camera Shy/Final Transmission location and more
av Ov3RT4K3R
Console Commands Trick for challenge maps Camera Shy locations Final Transmission locations Den locations and more...