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