Portal: Prelude Test Chamber 15 (Bonus)
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This is the twelfth Bonus map of the game. It is unlocked when the original Test Chamber 15 has been completed.
Test Chamber 15 (Bonus)
challenge_15.bsp 
Hazards
Strategy
Portals
- To do
Steps
- To do
Time
- To do
Award requirements
Please note the steps challenge is defective.
| Portals | Steps | Time | ||||||
|---|---|---|---|---|---|---|---|---|
| Bronze | Silver | Gold | Bronze | Silver | Gold | Bronze | Silver | Gold |
| 6 Portals | 4 Portals | 2 Portals | 0 Steps | 0 Steps | 0 Steps | 110 Seconds | 85 Seconds | 70 Seconds |
Video strategies
- To do