How to Unlock & Get Secret Gold Suit:
First, unlock access the Luck & Probability area, and have a Level 5 Keycard. You will unlock it automatically through normal story progression. Travel to the Luck & Probability area in the Research Sector, and unlock the Level 5 Keycard door to find a roulette table inside. Then, win a game of roulette. To do that, you need to be as lucky as possible. There are some nearby clues; read the notes to learn more about luck all around the world.

To win at roulette, complete the following tasks:

-Point the Horseshoe up.
-Take the 4-Leaf Clover and place it in the planter near the roulette wheel.
-Turn on all the lights in the room with the roulette wheel.
-Use kinesis to grab the gold fish and move it close to the roulette wheel.
Hold it when spinning the wheel, or place it close by.
-Activate the cat statue so that the paw is moving up and down.

Note: You may also need to activate the two bouncing ball fixtures in the room —-
it may or may not have an effect. If you have all the lucky items properly aligned, interact with the wheel to win and get the Gold Suit outfit and +2 AP.
You can change suits at the Central Executive Control Point.

Janitor's Assistant costume:
Successfully complete all Janitor missions, posted in the small Janitor's Room
in the Janitor's Office area of the Maintenance Sector. After completing all the
missions, complete the "Take A Break" mission to unlock the Janitor's Assistant
costume at the quest board.

Asynchronous costume:
Successfully 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 to find the
Asynchronous costume.