Here is the full list of all 18 Rogue Wizards achievements.
Ice Wizard
Fire Wizard
Earth Wizard
Sky Wizard
Nature Wizard
Cosmic Wizard
Merrol's Grandfather
Leader of the Wizards Guild
Stockpile 500,000 gold
Reach Level 50
Died with a health potion, how embarrassing.
Kill 20 Greedlings
Tried to kill 100 hallucinations
Find a rare item
Find a legendary item
Find a divine item
Discover 50 mimics
Acquire a pet