Here is the full list of all 39 Rogue Heroes: Ruins of Tasos achievements.
Defeat Omega Titan and save Tasos
Spend 50,000 total Gems
Defeat Glaciostraza, Guardian of Kryomar Temple
Stop the blizzard on Mount Sekoset
Defeat Kaimieror, Guardian of Fyrotek Castle
Collect acorns for Evie
Open 200 chests
Defeat Necrosaur
Defeat Rhizomorph, Guardian of Welestar Chamber
Build all buildings
Light 100 torches
Collect 10,000 total Gems
Ride in a Croaker in Crumwell Swamp
Defeat Koleoptera, Guardian of Terakar Keep
Cut down 500 bushes
Spend 5,000 total Gems
Break 500 pots
Destroy 500 monsters
Build 10 buildings
Collect 1,000 total Gems
Build 5 buildings
Acquire the Book of Beasts from Nik
Build Griff's Workshop
Die and be resurrected
Catch a fish
Block 100 projectiles with the shield
Collect all Power Spheres
Record all enemies in the Book of Beasts
Collect all classes
Bust up 100 crates
Dig up 20 buried objects
Harvest 50 crops
Collect all equipment
Stop the lava flow in the Overgrowth
Collect 100,000 total Gems
Spend 150,000 total Gems
Catch all fish types
Open all Shortcut Ramps
Reach floor 25 in the Endless Abyss