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