Alternate Bloons Rounds

Alternate Bloons Rounds (often abbreviated as ABR) is a game mode in Bloons TD 6. In standard play, it is played on Hard difficulty. This mode redesigns the first 140 rounds to be much more difficult, generally by introducing strong Bloon types earlier and having more rounds with Bloon Mods such as Camo Bloons. After round 140, the game changes to freeplay round generation with no alterations. Since the mode is normally played on Hard difficulty, rounds 1 and 2 are skipped by default and the player wins after completing round 80; rounds 81-140 are optional and rounds 1 and 2 can only be seen in other modes such as the Challenge Editor.

Rounds 101-140 do not exist in the console version due to it being based on an older version.

List of rounds

Game hints

End of round	Hint
3	Alternate Bloon rounds...
4	You know 'alternate' just means harder right?
5	Did you panic when you saw the Camo?
7	Still on max lives?
8	Hmm, wonder when the first Lead will appear?
21	That's what we call a 'cash starve' round...
39	Next round, MOAB as usual. Or is it?
59	BFB next round. Or should that be FBFB?
77	Next round is a real stinker...
79	ZOMG that was tough...
99	It wasn't that BAD was it?
100	Congratulations on beating round 100! Enjoy your reward!

Strategy

For more in-depth strategies, see Strategy:Alternate Bloons Rounds.

Alternate Bloons Rounds has greatly increased difficulty compared to Hard Standard. More challenging Bloon types with extra immunities, such as Camos, Leads, Purples, all appear earlier. In addition, many rounds are greatly increased in difficulty, such as Round 40 having a Fortified MOAB. Therefore, defenses should be well-equipped for all Bloon types and be able to defend more than in Hard Standard. Some progression in obtaining Monkey Knowledge is recommended before attempting Alternate Bloons Rounds.

Update history

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Version 44.0

• Now has pre-defined rounds for rounds 101-140, like the normal round set

Related achievements

25	Indie Win 25 games with Alternate Bloon Rounds Reward(s):  100,  ×3

	So Spiiicey Ninja Kiwi Beat Spice Islands on Alternate Bloon Rounds with only land towers Reward(s):  150,  ×2

Trivia

• The Camo Regrow Red on round 5 is a reference to a community meme where it was jokingly dubbed the strongest Bloon in the franchise.