Round 109 is a freeplay round in BTD6. It consists of 15 stacks of purples, MOABs, BFBs, and ZOMGs.
(15 Purples, 15 Fortified MOABs *2, 15 BFBs, 15 Fortified BFBs, 15 ZOMGs)
This isn’t a difficult round and it gives the player a relief after beating the very difficult Round 108. Since this round lacks Fortified ZOMGs, considerably not so hard as Round 108, even though the round consist MOAB streams and BFB groups between ZOMGs. The rather high RBE also gives the player lots of money.
In Bloonarius Prime, this round uses alternate lane because 109 is a prime number. Beware for BFBs and Fortified BFBs alongside ZOMGs, as they can play the role as shielding ZOMGs. This round is easier than Round 108, but debatable from Round 107 (with containing less ZOMGs but Packed BFBs added, increased RBE).
Shattering Shells can strip MOABs and BFBs' fortifications, effectively reducing this round's difficulty as Round 104.
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