Here is the full list of all 15 Fantasy Madness: Bloodbath achievements.
Defeat Ork Warlock
Get swallowed by a black hole
Get perished for the first time
Resist for at least 10 minutes in any game mode
Defeat Elite Troll
Gather 1000 pieces of gold savings
Open your first treasure chest
Reach maximum level of any skill
Reach Dwarven Playground
Reach the Oilmancy Sandpit
Unlock any Upgrade
Unlock 10 levels of Upgrades
Unlock 30 levels of Upgrades
Rescue Barbara of Brookly’on in the Dwarven Playground
Find Captain Hexxer in the Oilmancy Sandpit and convince him to join the cause