Rock 'N' Roll Defense achievements

Sell a total of 5 speakers

Upgrade a "The Tower" speaker to lvl2

Finish level 06 with at least 1 skull

Finish level 06 with at least 2 skulls

Deploy a total of 100 speakers

Defeat 100 pop fan 2

Accumulate 10000 coins

Finish level 05 with at least 1 skull

Defeat 100 pop fan 3

Deploy a total of 75 speakers

Upgrade a "The Tremor" speaker to lvl3

Finish level 04 with at least 1 skull