Here is the full list of all 27 Egression achievements.
Help reset an intro area puzzle
Juggle a balloon
Clean up the lobby
Try out every color
Win a different claw game prize
Try to extinguish a fire
Collect all the rocks
Strobe a light
Win a staring contest
Break all the glass
Let an AI win 3 times in a row
Sink all the balls
Hide somewhere you can't be found
Find the credits
Get the elevator humming again
Gain access to the Fire Alarm Control Panel
Gain access to the employee break room
Attempt to access a room improperly
Complete the Deep Sea Lab
Put all the tools back in their proper place
Defend your scientific mission from danger
Prepare to dive
Disturb the local wildlife
Stick your finger where it doesn't belong
Complete the Game Room
Learn how to escape
Complete the Lobby Runaround