Here is the full list of all 26 Dead Maze achievements.
Find a roommate
Equip a protection kit
Reach level 100
Find out what's threatening Lakeview
Reach level 5 Threat
Rescue another player 20 times
Craft 30 items
Discover a treasure among an infected horde
Complete 30 daily missions
Blow up a cafeteria
Deal with the Outrunner with Jared
Complete the tutorial
Find a place to settle
Meet Jay
Party with other players
Trigger an elemental combo 30 times
Kill 20 infected Peruvians
Find Egon
Witness an emergency meeting
Reach level 10
Reach level 30
Complete 10 Adventures or Expeditions
Build 30 buildings
Reach maximum quality for each type of clothing gear
Complete 5 adventures or expeditions in maximum difficulty
Kill 5 infected only with the explosion of an unstable infected