Door Prize – 20gs – Bronze
“Examine all the vitrified test chamber doors”
This is unlocked during Chapter Six. You need to find 6 doors, which are
located in 2 separate groups of 3. The first set of doors is located early on,
before starting the Repulsion Gel tests – a section requires a long jump by
placing a portal on a slant, then falling down an elevator shaft. The first 3
doors are on the wall underneath this slant. Examine the buttons next to each
door to hear some audio play on each one before proceeding. The second set of
doors is located in the control room at the end of Chapter Six, where you
unlock Tater Tote. Portal up to the catwalk at the very top of the chamber, you
will find an office. Behind a file cabinet on the left wall of this office
is a door leading to a corridor with the second set of doors.
Ship Overboard – 10gs – Bronze
“Discover the missing experiment”
This is unlocked during Chapter Six. In the same corridor as the second set of
vitrified doors for Door Prize is a large empty chamber. Enter this chamber
and examine the item at the end of the catwalk to unlock this achievement.