Portal: Prelude Test Chamber 13 (Bonus)
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This is the tenth Bonus map of the game. It is unlocked when the original Test Chamber 13 has been completed.
Test Chamber 13 (Bonus)
challenge_13.bsp 
Hazards
Strategy
Portals
- To do
Steps
- To do
Time
- To do
Award requirements
| Portals | Steps | Time | ||||||
|---|---|---|---|---|---|---|---|---|
| Bronze | Silver | Gold | Bronze | Silver | Gold | Bronze | Silver | Gold |
| 9 Portals | 8 Portals | 7 Portals | 80 Steps | 60 Steps | 48 Steps | 60 Seconds | 50 Seconds | 38 Seconds |
Video strategies
- To do