Full list of all 38 Necroking achievements.
The base game contains 32 achievements, and there are 2 DLC packs containing 6 achievements.
Unlock all allied units from the main biomes in the bestiary
In the same fight, kill the harpy and win.
Make 10 enemy plants grow during the battle
Collect 4 Coffins in the fourth area
Kill your unit with a red candy
Use pumpkin 10 times