Here is the full list of all 17 Dofense achievements.
Finish introductory battles
Win "Terminal Tactics" by allocating all crystals to Wall
Win “Neighbourhood” by allocating all crystals to Pyro
Unlock all towers
Kill 50 enemies with Volta
Destroy all the creep in “Think inside the box”
Win "Firebrand"
Win “Six ways to hell” without losing any core
Kill 5+ enemies with Sniper gun
Kill 1000 enemies in single level
Drill 10+ locations with Sky Drill
Win "Mount Turtle"
Kill 500 enemies under Train
Kill 500 enemies with Grinder
Win "Master of the Mint" with 7 cores
Design and Play a custom level in Sandbox
Publish a custom level on the Steam Workshop