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