Rank 21 is the rank succeeding Rank 20. This rank unlocks the researcher Pumbob, who automates and speeds up Deep Bores. Rank 21 has 15 Missions, and at least 12 of them must be completed in order to rank up to Rank 22.


# Name Requirement Reward
1 R&D Asap! Spend 1,500 Science Wood
2 Earth Shattering Kaboom! Own 8,003 Blasting Sites Stone
3 This Land is Your Land! Trade 14 Land Stone
4 Sewer Pursuer Own 160,000 Sewers Wood
5 Armed and Glorious! Collect 50 DD Bullets Wood
6 Professional Burrower! Own 2.6 M Mines Wood
7 Duck and Coal! Own 15 M Coal Plants Stone
8 Promote Researchers Upgrade 3 Cards Wood
9 Ambulance-A-Lot! Own 18 M Ambulances Wood
10 Land in the Hand! Collect 40 KK Land Wood
11 Exciting Boring Work! Own 500 Deep Bores Stone
12 Bustling Bunkers! Own 22 M Bunkers Wood
13 A Healthy People! Collect 700 DD Placebos Wood
14 Rail Sale Own 333 Trains Stone
15 Stronger Than Dirt! Collect 4 KK Ore Wood



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