Top 100 Portal Videos With The Longest Duration by Alexey Vsemogushii
| Video Title | Duration | Category | Game | |
|---|---|---|---|---|
| 1. | Portal: Revolution walkthrough | 4:21:05 | Walkthrough | Portal |
| 2. | Error (Portal Mod): walkthrough | 1:00:37 | Walkthrough | Portal |
| 3. | Portal: walkthrough | 58:18 | Walkthrough | Portal |