Top 100 Portal Videos With The Longest Duration by MythicTheMystic
| Video Title | Duration | Category | Game | |
|---|---|---|---|---|
| 1. | More Testing pt. 4 | 1:45:35 | Portal | |
| 2. | More Testing pt. 5 | 1:16:10 | Portal | |
| 3. | Return to when it began | 1:11:19 | Portal | |
| 4. | Time for Testing (errored attempt) | 31:32 | Portal |