Rank 81 is the rank following Rank 80. No new researchers unlock at this rank. You must complete at least 18 out of the 21 missions available to move on to Rank 82

# Name Requirement Reward
1 A Healthy People! Collect 5.7 AAA Placebos Wood
2 Science Rules! Collect 12,000 Science Stone
3 Artillery Deployed! Own 945 M Artilleries Wood
4 Hankering for Tankering! Own 4.3 B Tankers Wood
5 More Potatoes, More Glory! Collect 69 NNN Potatoes Wood
6 Perfect for Nuclear Wessels! Own 20 B Nuclear Plants Stone
7 Armed and Glorious! Collect 8.4 GGG Bullets Wood
8 Hospitable Host-Pital! Own 9.5 B Hospitals Stone
9 Promote Researchers Upgrade 2 Cards Stone
10 Land in the Hand! Collect 2.7 PPP Land Wood
11 A Must for Dusting! Own 180 B Crop Dusters Stone
12 Stronger Than Dirt! Collect 274 KFC Ore Wood
13 Coast Busters! Own 10 B Coast Guards Stone
14 Fortress To Impress! Own 64,897 Fortresses Stone
15 Red Eye Flight! Own 38 B Airports Stone
16 Stronger Than Dirt! Collect 29 MMM Ore Wood
17 Dome Rhymes With Home! Own 528 Biodomes Stone
18 A Healthy People! Collect 911 GGG Placebos Wood
19 Red Eye Flight! Own 66 B Airports Stone
20 Fortress To Impress! Own 75 M Fortresses Stone
21 Stronger Than Dirt! Collect 3.3 NNN Ore Wood
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