Here is the full list of all 51 Idle Dungeons achievements.
Prestige Once
Purchase 100 Spells
Reach XP Level 250
Reach XP Level 500
Pass Through 50 Dungeons
Pass Through 100 Dungeons
Pass Through 250 Dungeons
Pass Through 500 Dungeons
Pass Through 1,000 Dungeons
Pass Through 2,500 Dungeons
Pass Through 10,000 Dungeons
Reach XP Level 10
Reach XP Level 25
Reach XP Level 50
Reach XP Level 100
Purchase 25 Spells
Reach XP Level 5
Pass through 10 Dungeons
Click 1,000 times
Kill 1 Boss
Complete the tutorial
Click 100 Times
Make your first click!
Claim 1 Daily Reward
Create your adventurer!
Click 10,000 Times
Click 25,000 Times
Click 50,000 Times
Click 100,000 Times
Click 1,000,000 Times
Purchase 1,000 Spells
Purchase 10,000 Spells
Purchase 100,000 Spells
Prestige 5 Times
Prestige 10 Times
Prestige 25 Times
Prestige 50 Times
Prestige 100 Times
Kill 100 Bosses
Kill 1,000 Bosses
Kill 10,000 Bosses
Kill 50,000 Bosses
Kill 100,000 Bosses
Claim 7 Daily Rewards
Claim 14 Daily Rewards
Claim 30 Daily Rewards
Obtain 10 Items
Obtain 25 Items
Obtain 100 Items
Obtain 250 Items
Obtain 500 Items