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