Tier
Upgrade
Prerequisites
City Cash cost
Time (minutes)
XP for researching
1
Monkey Beacon
City Level 5
2,000
45
70
2
Jungle Drums
City Level 9
6,000
360
100
3
Monkey Town
City Level 15
27,000
2,880
600
4
Energy Beacon
City Level 20, Energy Concentration Cells built
36,000
4,320
1,200
1
Monkey Fort
City Level 3
2,000
45
150
2
Radar Scanner
City Level 12, Camo Countermeasures built
7,500
180
150
3
Monkey Intelligence Bureau
City Level 15
18,000
2,160
300
4
MIB Call To Arms
City Level 20, Monkey Intelligence Comms built
60,000
5,760
2,000
Tier
Upgrade
Prerequisites
City Cash cost
Bloonstone cost
Time (minutes)
XP for researching
1
Monkey Beacon
City Level 5
2,000
—
45
70
2
Jungle Drums
City Level 9
6,000
—
180
100
3
Monkey Town
City Level 15
27,000
20
2,880
600
4
High Energy Beacon
City Level 20, Energy Concentration Cells built
36,000
50
4,320
1,200
1
Monkey Fort
City Level 3
2,000
—
45
150
2
Radar Scanner
City Level 12, Camo Countermeasures built
7,500
—
180
150
3
Monkey Intelligence Bureau
City Level 15
18,000
20
2,160
300
4
M.I.B Call to Arms
City Level 20, Monkey Intelligence Comms built
60,000
50
5,760
2,000
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