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