Here is the full list of all 42 Wizordum achievements.
Complete Grimbrook Outskirts
Complete Canal Streets
Complete Murky Wastes
Complete Mourning Grounds
Complete Grim Haven
Complete City of Ember
Complete Episode 1
Finish any level 100%
Beat any level's par time
Finish any level in the Timed Run mode
Kill the Treasure Goblin before it disappears
Shatter 6 or more frozen enemies at once
Break 100 objects
Empty the whole water basin
Hold all keys at once
Collect 2500 treasure items or more
Finish any user level
Create and playtest your custom map in the map editor
Unlock and loot all Gold Treasure chests in any level
Find the Secret level in Episode 1
Complete Grimbrook Forest
Complete Warship Rampage
Complete Swamp of Decay
Complete Weeping Gorge
Complete Shadows & Chains
Complete Howling Halls
Complete Baron's Demise
Kill 5 ore more enemies at once with single rat leap
Electrocute 10 enemies in the water (indirectly)
Kill 50 spiders
Do some tickling
Buy your first upgrade at the shop
Spend 100.000 Treasure in the shop
Learn your first spell
Learn all spells