Freeplay

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In the Bloons TD series, Freeplay is the game mode accessed after completing a game on a certain difficulty. After completing a difficulty, players may be presented the option to continue to Freeplay. During Freeplay, there typically comes a point after which rounds are randomly generated and become harder and harder because MOAB-Class Bloons increase in health and Bloons increase in speed as the rounds progress with a mechanic called Ramping.

Bloons TD 3

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Bloons TD 4

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The Flash version of Bloons TD 4 is limited to 255 rounds outside of Apopalypse. The last five rounds don't spawn any Bloons, and Round 250 has 9999 BFBs. The mobile version of Bloons TD 4 has no known round limit, as players have went beyond 250 rounds on Mobile.

Freeplay Mode in Bloons TD 4 has Bloon spawns ranging from Zebras to BFBs, with rounds getting longer and harder the further as the player progresses. Rounds with up to 10 million RBE or more can appear when going past Round 240.

Bloons TD 5

Bloons TD 5 has freeplay effects after Round 85. Freeplay effects include:

• Ceramic Bloons turn into Super Ceramic Bloons.
• MOAB-class Bloons gain 5% health per round starting from Round 103.
• All Bloons gain 15% speed per round starting from Round 103 as well.
• Cash per pop continues to get reduced (this actually begins at Round 50, but that is not when most players consider freeplay):

Start Round	End Round	Relative cash per pop
1	50	100%
51	60	50%
61	85	20%
86	100	10%
101	-	2%

Rounds are randomly generated, having Bloon spawns ranging from Ceramics to ZOMGs.

Bloons TD 6

Bloons TD 6 has freeplay effects after round 80 (with some exceptions involving Quests). Freeplay effects include:

• Ceramic Bloons turn into Super Ceramic Bloons.
• Some bloons cost less lives to be leaked than before:

Bloon	Pre-freeplay lives cost	Freeplay lives cost	reduction
Purple	11	6	-5
Lead	23	7	-16
Fortified Lead	26	10	-16
MOAB	616	460	-156
Fortified MOAB	856	700	-156
BFB	3164	2540	-624
Fortified BFB	4824	4200	-624
ZOMG	16,656	14,160	-2496
Fortified ZOMG	27,296	24,800	-2496
DDT	816	660	-156
Fortified DDT	1256	1100	-156
BAD	55,760	50,300	-5460
Fortified BAD	98,360	92,900	-5460

• MOAB-Class Bloons gain additional HP every round:

Start round	End round	additional HP per round	multiplier at start round	multiplier at end round
81	100	+2%	1.02	1.40
101	125	+5%	1.45	2.75
126	150	+15%	2.90	6.50
151	250	+35%	6.85	41.50
251	300	+100%	42.50	91.50
301	400	+150%	93.00	241.50
401	500	+250%	244.00	491.50
501	-	+500%	496.50	-

• All bloons start to gain an additive +2% speed every round, with random jumps at certain rounds:

Start round	End round	additional speed per round	multiplier at start round	multiplier at end round
81	100	+2%	1.02	1.40
101	150	+2%	1.60	2.58
151	200	+2%	3.00	3.98
201	251	+2%	4.50	5.50
252	-	+2%	6.00	-

• Cash per pop continues to gets reduced (this actually begins at round 50, but that is not when most players consider freeplay):

Start round	End round	relative cash per pop
1	50	100%
51	60	50%
61	85	20%
86	100	10%
101	120	5%
121	-	2%

• XP decreases to 10% of normal rates after round 100
• Duration of applied statuses to Bloons decreases:

Start round	End round	Status duration decrease
150	199	-10%
200	249	-20%
250	299	-30%
300	349	-40%
350	-	-50%

Past round 140, all rounds are randomly generated, except for round 200. Rounds 163 and 263 are randomized as well, but have a much narrower range of possible bloons. Rounds 10,000 and above are also pre-determined, but they aren't humanly possible to reach*.