Here is the full list of all 42 Soul Survivors achievements.
Max all talents for the Blood Maiden
Defeat the Ebon King without evading
Defeat the Ebon King
Destroy 10 Gargoyle Statues in a single run
Defeat Nibbler in Usvit Depths
Max all talents for the Pyromancer
Defeat the Midnight Gatekeeper
Take No Damage for 5 Minutes
Defeat Soulus
Defeat Lady Nox
Survive 5 Curses
Defeat Velya
Discover 15 Tomes of Knowledge
Burn 1,000 enemies with fire
Max all Talents for the Shadow Monk
Defeat Sporelord Rotwood
Use 3 Sacrifice Altars
Max all Talents for the Ranger
Max all Talents for the Necromancer
Defeat Bilee
Collect 100 Flesh Piles in a Single Run
Max all Talents for the Bogatyr
Defeat Chancellor Autlaic
Collect 100,000 Souls
Defeat Bloodsap
Kill 1,000 Enemies with the Flail
Defeat Warden Grainloch
Kill 1,000 Skeletons
Collect Nibbler's Cheese in the Catacombs
Collect 500 Gold in a Single Run
Kill 50 Mimics
Defeat the Flesh Golem
Collect 10,000 Souls
Destroy an Entire Fly Swarm
Activate 3 Cursed Altars
Kill 5 Mimics
Kill 1000 Flies
Kill 500 Zombies
Collect 1,000 Souls
Collect 1,000,000 Souls
Take No Damage for 10 Minutes
Survive 10 Curses