Here is the full list of all 18 Moonfall achievements.
Beat the tutorial
Unlock all abilities in Elemental Engineer tree
Beat the game in hard mode
Hold 5 000 currency at a single time
Defeat the Skeletal Boss
Kill 3 enemies with a single spell
Unlock all abilities in Vanguard tree
Spend a total of 10 000 in shops
Destroy 50 enviromental hazards
Fill your inventory
Beat the game
Kill 5 enemies with a single spell
Unlock all abilities in the Shadow tree
Defeat the Goblin Mecha
Defeat the Totem Golem
Reach level 5 with any class
Reach level 10 with any class
Reach level 15 with any class