Top 100 Portal Videos With The Longest Duration by WithPCGameTop 100 » 200 » 300 » 400 » 500Video TitleDurationCategoryGame1.Warp - Walkthrough - Mission 4 - Aquatic Research Department27:43WalkthroughPortal 2.Warp - Walkthrough - Mission 6 - Laboratory23:54WalkthroughPortal 3.Warp - Walkthrough - Mission 7 - Command Center23:15WalkthroughPortal 4.Warp - Walkthrough - Mission 3 - Command Center17:50WalkthroughPortal 5.Warp - Walkthrough - Mission 8 - STU-2310:39WalkthroughPortal 6.Warp - Walkthrough - Mission 2 - Laboratory9:40WalkthroughPortal Top 100 » 200 » 300 » 400 » 500