Here is the full list of all 40 Epic Clicker Journey achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Reach level 5 of Dungeon on third map level
Complete the map twice
Reach level 50 of Dungeon on first map level
Reach player level 50
Complete the map
Win gold using #LetsPlayAGame item
Open all closed locations
Use #BeMyBFF item
Kill The Dragon
Loot #MuchTvWow item
Drink water from fountain in dungeon
Deal 1 million damage
Reach level 25 of Dungeon on first map level
Reach level 10 of Dungeon on first map level
Enter the dungeon
Reach player level 25
Use healing potion
Kill 200 enemies
Reach player level 10
Complete the multiplayer location
Buy pet
1.000 clicks
Escape from battle
Open the locked location
Complete the first location
Read information about authors
Reach maximum level of weapon
Reach maximum level of armor
Reach maximum level of shield
1.000.000 clicks
Complete the map three times
Reach level 100 of Dungeon on first map level
Reach level 7 of Dungeon on second map level
Reach level 13 of Dungeon on second map level
Reach level 21 of Dungeon on second map level
Reach level 69 of Dungeon on second map level
Reach level 15 of Dungeon on third map level
Reach level 30 of Dungeon on third map level
Reach level 50 of Dungeon on third map level
Reach player level 100