Here is the full list of all 63 Underground Keeper achievements.
Level 10 completed!
Level 9 completed!
Level 8 completed!
Level 7 completed!
Level 6 completed!
Level 5 completed in less than 1 minute!
Level 5 completed!
Level 4 completed!
Level 3 completed!
Level 2 completed!
Level 1 completed!
Level 20 completed!
Level 30 completed!
Level 40 completed!
Level 50 completed!
Level 60 completed!
Level 15 completed in less than 1 minute!
Level 25 completed in less than 1 minute!
Level 11 completed!
Level 12 completed!
Level 13 completed!
Level 14 completed!
Level 15 completed!
Level 16 completed!
Level 17 completed!
Level 18 completed!
Level 19 completed!
Level 21 completed!
Level 22 completed!
Level 23 completed!
Level 24 completed!
Level 25 completed!
Level 26 completed!
Level 27 completed!
Level 28 completed!
Level 29 completed!
Level 31 completed!
Level 32 completed!
Level 33 completed!
Level 34 completed!
Level 35 completed!
Level 36 completed!
Level 37 completed!
Level 38 completed!
Level 39 completed!
Level 41 completed!
Level 42 completed!
Level 43 completed!
Level 44 completed!
Level 45 completed!
Level 46 completed!
Level 47 completed!
Level 48 completed!
Level 49 completed!
Level 51 completed!
Level 52 completed!
Level 53 completed!
Level 54 completed!
Level 55 completed!
Level 56 completed!
Level 57 completed!
Level 58 completed!
Level 59 completed!