Top 100 Portal Videos With The Longest Duration by TaryNoLonger
| Video Title | Duration | Category | Game | |
|---|---|---|---|---|
| 1. | Lethal Events 4 | 31:55 | Portal | |
| 2. | A Series of Lethal Events 3 | 30:45 | Portal | |
| 3. | A Series of Lethal Events 3 | 30:41 | Portal | |
| 4. | A Series of Lethal Events: Part 6 | 25:34 | Portal | |
| 5. | A Series of Lethal Events 2! | 25:14 | Portal | |
| 6. | A Series of Lethal Events: Part 8 | 23:53 | Portal | |
| 7. | A Series of Lethal Events: Part 9 | 22:55 | Portal | |
| 8. | A Series of Lethal Events: Part 10 | 19:59 | Portal | |
| 9. | A Series of Lethal Events: Part 7 | 17:29 | Portal |