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RBE means Red Bloon Equivalent and tells you how many bloons you will have to pop in the current round.
~ Round 5 in Bloons TD 4
RBE

A RBE of 14 while playing a stage on Easy in BTD4

RBE

The RBE display before Round 1

The Red Bloon Equivalent (RBE) of a Bloon or Round is total damage required to completely pop that Bloon or group of Bloons (for instance 4 green bloons require 12 damage to completely pop all of them, equalling RBE 12 (3 RBE each)). Though the concept can be applied to all BTD games, RBE was formally named in Bloons TD 4. So, for example, in the picture to the right fourteen pops are required to pass that particular Round. It also appears in Bloons TD 4 Expansion and Bloons TD 5. The lowest RBE of a round in BTD4 is 11, the highest is 2881116 on Flash (Round 250 - no rounds were programmed after this). The final round of BTD4 has 999 B.F.B.s, and it is nearly impossible to survive, even if your entire screen is filled with Sun Gods, meaning Operation: Dart Storms are a must.

In BTD5, all Freeplay rounds have a random RBE past round 85, the highest non-freeplay round is 62440 (Round 84, though Impoppable Round 85 has 83,280) while the lowest is 3 (Round 24).

RBE in BTD5

RBE in Bloons Tower Defense 5.

In BTD6, RBE is not mentioned in-game, but there are some towers that involve RBE, such as Avatar of Wrath's damage scaling, and the triggering of the instakill grapple from Great White and above (notably Megalodon versus BADs).

RBE Values for each round[]

Round RBE Bloon spawns
1 12 12 Red
2 25 25 Red
3 34 24 Red, 5 Blue
4 58 10 Red, 24 Blue
5 80 30 Red, 25 Blue
6 45 15 Green
7 150 75 Blue
8 251 115 Red, 68 Blue
9 164 49 Blue, 22 Green
10 120 40 Green
11 96 24 Yellow
12 147 30 Blue, 25 Green, 3 Yellow
13 280 40 Red, 75 Blue, 30 Green
14 104 26 Yellow
15 240 30 Blue, 60 Green
16 400 80 Blue, 80 Green
17 390 150 Blue, 30 Green
18 250 30 Blue, 26 Green, 28 Yellow
19 276 92 Green
20 360 40 Blue, 60 Green
21 395 10 Blue, 85 Green, 30 Yellow
22 180 45 Yellow
23 361 35 Green, 64 Yellow
24 340 20 Blue, 60 Green, 30 Yellow
25 440 80 Green, 50 Yellow
26 340 85 Yellow
27 180 20 Black
28 340 40 Green, 55 Yellow
29 680 125 Yellow, 20 Black
30 756 252 Green
31 447 10 Blues, 28 Blacks (175 RBE remaining)
32 362 25 Green, 20 Yellow,
33 600 150 Yellow
34 470 35 Green, 35 Yellow, 25 Black
35 723 85 Green, 117 Yellow
36 769 118 Yellow, 33 Black
37 531 59 Black
38 900 225 Yellow
39 860 50 Red, 50 Blue, 50 Green, 50 Yellow, 40 Black
40 720 80 Black
41 540 20 Black, 40 White
42 740 50 Yellow, 30 Black, 30 White
43 1,400 152 Yellow, 48 Black, 40 White
44 1,080 120 Black
45 1,125 125 White
46 1,320 60 Yellow, 60 Black, 60 White
47 1,310 80 Yellow, 70 Black, 40 White
48 1,648 70 Yellow, 76 Black, 76 White
49 1,777 100 Yellow, 83 Black, 70 White
50 1,800 100 Black, 100 White

BTD2 Rounds

BTD3 Rounds

BTD4 Rounds

Round RBE Base RBE Bloon spawns
2 30 30 Red
3 30 20 Red, 5 Blue
4 60 30 Red, 15 Blue
5 55 5 Red, 25 Blue
6 57 15 Red, 15 Blue, 4 Green
7 85 20 Red, 25 Blue, 5 Green
8 92 10 Red, 20 Blue, 14 Green
9 90 30 Green
10 204 102 Blue
11 74 10 Red, 10 Blue, 12 Green, 2 Yellow
12 80 15 Blue, 10 Green, 5 Yellow
13 185 100? Red, 23? Green, 4 Yellow
14 145 49? Red, 15 Blue, 10 Green, 9? Yellow
15 91 20 Red, 12 Green, 5 Yellow, 3 Pink
16 112 20 Green, 8 Yellow, 4 Pink
17 32 8 Yellow Regen
18 240 80 Green
19 101 ? 10 Green, 5 Yellow, 5 Yellow Regen, 8 Pink
20 66 6 Black
21 70 14 Pink
22 88 8 White
23 99 5 Black, 4 White
24 3 1 Green Camo
25 124 31 Yellow Regen
26 207 23 Pink, 4 Zebras
27 545 ? 50? Red, 40? Blue, 30? Green, 25? Yellow
28 92 4 Lead
29 160 ?
30 207 9 Lead
31 230 8 Zebra, 2 Zebra Regen
32 767 Black, White, Lead

Round RBE Base RBE Bloon spawns
1 20 20
2 35 35
3 35 35
4 71 71
5 59 59
6 57 57
7 75 75
8 92 92
9 90 90
10 204 204
11 78 78
12 80 80
13 169 169
14 145 145
15 151 151
16 152 152
17 48 48
18 240 240
19 141 141
20 66 66
21 230 230
22 176 176
23 154 154
24 43 43
25 210 210
26 207 207
27 535 535
28 138 138
29 260 260
30 207 207
31 406 406
32 495 495
33 72 72
34 778 778
35 1,015 1,015
36 760 760
37 1,202 1,202
38 1,157 1,157
39 1,620 1,620
40 616 616
41 2,040 2,040
42 517 517
43 1,198 1,198
44 1,150 1,150
45 2,289 2,289
46 684 684
47 1,598 1,598
48 2,752 2,752
49 4,771 4,771
50 3,540 3,540
51 2,030 2,030
52 3,447 3,447
53 2,248 2,248
54 4,872 4,872
55 5,296 5,296
56 2,496 2,496
57 4,344 4,344
58 5,780 5,780
59 4,270 4,270
60 3,164 3,164
61 6,530 6,530
62 8,247 8,247
63 14,413 14,413
64 6,264 6,264
65 18,966 18,966
66 7,496 7,496
67 6,410 6,410
68 5,628 5,628
69 6,680 6,680
70 13,184 13,184
71 9,280 9,280
72 10,280 10,280
73 11,256 11,256
74 18,054 18,054
75 25,402 25,402
76 6,240 6,240
77 22,596 22,596
78 26,382 26,382
79 45,804 45,804
80 16,656 16,656
81 44,506 43,996 (+2%)
82 52,320 51,120 (+4%)
83 22,680 22,320 (+6%)
84 51,480 49,480 (+8%)
85 30,704 28,704 (+10%)
86 27,040 25,240 (+12%)
87 63,008 57,408 (+14%)
88 63,600 57,904 (+16%)
89 64,384 58,624 (+18%)
90 2,756 2,516 (+20%)
91 71,160 64,560 (+22%)
92 117,408 103,008 (+24%)
93 62,936 54,512 (+26%)
94 178,112 150,812 (+28%)
95 80,860 71,260 (+30%)
96 238,952 200,232 (+32%)
97 69,984 56,384 (+34%)
98 327,456 266,256 (+36%)
99 47,424 40,128 (+38%)
100 67,200 50,720 (+40%)
101-199 Random Random
200 5,391,840 200,640 (+3,250%)
201-9,999 Random Random
10,000 40,645,592,000 10,032,000 (+493,250%)
10,001 1,279,872 1,279,872 (+493,300%)
10,002 98,697,200 47,200 (+493,350%)
10,003 740,208,800 258,800 (+493,400%)
10,004 4,934,935,200 1,435,200 (+493,450%)
10,005 197,427,200 67,200 (+493,500%)
10,006-200,135 Depends 10,032,000 (+Depends%)
200,136-3,865,535 824,001,792,000 10,032,000 (+10,000,000%)
3,865,536+ 0 0 None

Round RBE Base RBE Bloon spawns
100 67200 50720
101-199 Random Random
200 5391840 200640
201-9,999 Random Random
10,000 40,645,592,000 10,032,000
10,001 1,279,872 1,279,872
10,002 98,697,200 47,200
10,003 740,208,800 258,800
10,004 4,934,935,200 1,435,200
10,005 197,427,200 67,200
10,006-3,865,536 Round*8,240,000+1,792,000 10,032,000


Trivia[]

  • The lowest round RBE (as of now) is 3, the green camo on round 24 in Bloons TD 5.
    • The second lowest RBE (as of now) is 11 on round 24 in BTD4 as mentioned above.
    • The highest non-randomized round RBE (as of now) is 2,881,116 on round 250 in BTD4; however, this is only available in freeplay.
  • In Bloons TD 4, the RBE of the Camo Bloon in Round 24 should be 11, yet the in-game RBE says 9.
  • In BTD5, rounds 21 and 36 are the only rounds that consist entirely of Pink Bloons.
  • In BTD5, some Daily Challenges have a modified RBE.
  • RBE is sometimes confused to stand for Rate Bloons Explode.
  • Avatar of Wrath is notable for having its upgrade centered around this mechanic.
  • In BTD6, the only known mention of the term "RBE" is within the description for the Big Traps Monkey Knowledge point.

See Also[]

  • Pre-Round Comment if you're wondering what the comment is before the rounds, you will be dedicated to this page.
  • Rounds if you want to know more about the rounds' RBE.
  • Bloons TD Battles for an exact RBE list for the game.


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