Underworld Idle Achievements8 achievements
Crystal 1
Activate crystal #1
72.0%
Common
Crystal 2
Activate crystal #2
60.8%
Common
Crystal 3
Activate crystal #3
51.9%
Common
Crystal 4
Activate crystal #4
31.9%
Uncommon
Crystal 5
Activate crystal #5
25.3%
Rare
Boiler
Blow up the boiler
34.2%
Uncommon
Obelisk
Use the obelisk
14.5%
Epic
Warlocks
Unlock warlocks
12.4%
Epic