Rock 'N' Roll Defense achievements

Accumulate 15000 coins in a single stage

Finish level 05 with at least 3 skulls

Defeat 1 country boss

Upgrade a "The Roaming" speaker to lvl2

Finish level 10 with at least 1 skull

Finish level 09 with at least 3 skulls

Upgrade a "The Roaming" speaker to lvl3

Defeat 1000 enemies

Finish level 03 with at least 3 skulls

Accumulate 50000 coins

Release a total of 25 specials

Sell a total of 10 speakers