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