Here is the full list of all 26 Dead Maze achievements.
Reach level 10
Rescue another player 20 times
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
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
Party with other players
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 30