Guide: Portal Least Time Challenge (Test Chamber 18) Published 2013-03-12 Download video MP4 360p Download video MP4 720p Recommendations 10:26 Portal Challenges: Least Steps 06:11 How a Non-Speedrunner Can Skip Chamber 18 17:16 Game Theory: Can You Solve Portal's IMPOSSIBLE Puzzle? (Portal) 02:21 Guide: Portal Least Steps Challenge (Test Chamber 18) 03:05 Portal - 'Still Alive' 01:09 Guide: Portal Least Time Challenge (Test Chamber 16) 02:41 Portal - Chamber 18 (least steps) 02:29 Portal - Chamber 18 (least portals) 05:51 Portal Challenges: Least Time 04:47 Portal: Challenge-map - Chamber 17 (Least Portals) 19:42 Climbing the Anansi Tower in a reasonable amount of time... 05:47 [Road to 100%] Portal - Camera Shy - Achievement Walkthrough (All cameras) 14:49 Top 10 Favorite Portal 2 Community Test Chambers 01:54 Portal - Chamber 16 (least steps) 16:12 I Made the Same Game in 9 Engines 09:28 Portal walkthrough - Test Chamber 18 (Advanced) 01:50 Portal - Chamber 15 (least steps) 01:43 Portal - Chamber 15 (least portals) 08:36 Portal Challenges: Least Portals 01:36 Portal - Chamber 18 (least time) Similar videos 00:32 Portal - Test Chamber 18: Least Time Gold Run (OoB) 00:46 Test Chamber 18 in only 4 portals (using glitches) 00:49 Portal Least Time Challenge 18 : 35 Seconds 00:14 Chamber 18 Least Time Challenge (Gold) 7 seconds 02:23 Guide: Portal Least Portals Challenge (Test Chamber 18) 01:35 Portal Challenge Chamber 18 Least Time (1:08) 01:37 Portal - Test Chamber # 18 No-Glitch Least Time 00:44 [Portal] Chamber 18 - Least Time (0:27) 06:06 Portal - Gold: Least Time - 13-18 02:01 Portal Walkthrough - The Challenge Test Chambers - Test Chamber 18 (Least Time - 1:13) More results