Rounds
Round 123
Round 123 in BTD6: 200 MOABs and 8 Fortified ZOMGs over 40 seconds. RBE, cash and how to beat it.
Guide
Round 123 sends 200 MOABs and eight Fortified ZOMGs, both spread evenly over 40 seconds.
At ×2.55 ramping, MOABs have about 510 health and Fortified ZOMGs about 20,400. The MOAB stream is constant, so towers set to First will waste shots on MOABs while Fortified ZOMGs walk past. RBE is 629,936 and the round pays about $5,000 from pops plus a $223 bonus.
Bloons in round 123
- 8 × ZOMG (Fortified) (0–40 s)
- 200 × MOAB (0–40 s)
How to beat round 123
Separate your damage by target.
- Set Elite Snipers and other single-target towers to Strong so they focus the Fortified ZOMGs.
- Let area blimp damage handle the 200 MOABs and the Super Ceramics they drop.
- Spread your abilities over the round, since the ZOMGs arrive about five seconds apart.
Alternate Bloons Rounds
The Alternate Bloons Rounds version sends 100 Fortified DDTs and 200 Fortified MOABs, for 561,600 RBE.
- 100 × DDT (Fortified)
- 200 × MOAB (Fortified)
Frequently asked questions
What is in round 123 BTD6?
200 MOABs and 8 Fortified ZOMGs, both spread over about 40 seconds.

