Rocks Fall, Everything Pops

"Rocks Fall, Everything Pops" is a special mission featuring the I.S.E. and its stronger counterpart the M.E.S.A. . The special mission involves passing Medium rounds 45-70 on the Boulder Nightmare map, with a battle against M.E.S.A. in the last round instead of round 71.

Special Effects
Player begins with 17,500 cash.

All B.F.B.s replaced by I.S.E.

MOAB-Class Bloons and bloons spawned from them will return full cash on popping, but non-MOAB-Class Bloons will return half as much.

At some point during every round, a boulder will spawn from the central formation. This boulder will travel 200 pixels in a random direction and will pop any Bloons it touches and will damage any towers it touches for 8 hit points.

On round 26 (equivalent to round 71) the central rock formation will collapse and reveal the M.E.S.A. instead of spawning the regular Bloons of the level.