How to Unlock Every Costume
You can switch costumes at the Central Executive Control Point. The following costumes can be unlocked — just follow the instructions below.
Civilian: N/A – Default Costume.
Candidate P7: Found in the Containment Sector, Prime Candidate Training room. Look in the P7 room and interact with the open cabinet.
Director’s Suit: Unlocked for completing the main story.
Office Assistant: Unlocked after completing a part of the main story very late in the game.
Asynchronous Suit: Complete the Mirror quest in the Synchronicity Lab / Mirror Studies in the Research Sector. After defeating the optional boss, look in the broken mannequin chamber to the left as you enter from the Ritual Division.
Janitor’s Assistant: Complete all Janitor Side-Quests, posted in the small Janitor’s Room in the Janitor’s Office area of the Maintenance Sector. Complete all the missions, then ‘Take A Break’ and the outfit will appear on the quest board.
Golden Suit: Unlocked by completing a secret quest in the Luck & Probability room in the Research Sector. You need to win at the roulette game. To do that, you need to make your luck as good as possible.
Turn the Horseshoe pointed up.
Make the cat paw go down.
Turn on all the lights in the roulette room.
Bring the fish into the roulette and drop it close to the wheel.
Bring the 4-Leaf Clover and place it in the pot near the roulette wheel.