Portal: Prelude Test Chamber 13 (Bonus)

This is the tenth Bonus map of the game. It is unlocked when the original Test Chamber 13 has been completed.

Hazards

 * Cube Hazard
 * Turrets
 * Goo

Strategy
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Portals

 * To do

Steps

 * To do

Time
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 * To do

Video strategies

 * To do