Here is the full list of all 41 Soul Survivors achievements.
Collect Nibbler's Cheese in the Catacombs
Burn 1,000 enemies with fire
Max all Talents for the Bogatyr
Defeat Chancellor Autlaic
Activate 3 Cursed Altars
Kill 1,000 Skeletons
Kill 1,000 Enemies with the Flail
Collect 100 Flesh Piles in a Single Run
Defeat Warden Grainloch
Use 3 Sacrifice Altars
Kill 50 Mimics
Destroy an Entire Fly Swarm
Defeat the Flesh Golem
Collect 10,000 Souls
Kill 5 Mimics
Kill 500 Zombies
Collect 1,000 Souls
Collect 500 Gold in a Single Run
Kill 1000 Flies
Collect 100,000 Souls
Collect 1,000,000 Souls
Defeat Bloodsap
Defeat Velya
Max all Talents for the Necromancer
Take No Damage for 5 Minutes
Take No Damage for 10 Minutes
Survive 5 Curses
Defeat Bilee
Max all Talents for the Ranger
Max all Talents for the Shadow Monk
Discover 15 Tomes of Knowledge
Defeat Sporelord Rotwood
Defeat the Ebon King
Defeat the Midnight Gatekeeper
Defeat Soulus
Defeat Lady Nox
Survive 10 Curses
Defeat Nibbler in Usvit Depths
Defeat the Ebon King without evading
Destroy 10 Gargoyle Statues in a single run
Max all talents for the Pyromancer