Here is the full list of all 240 Rock 'N' Roll Defense achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Finish level 40 with at least 1 skull
Finish level 40 with at least 2 skulls
Finish level 40 with at least 3 skulls
Beat the fourth world with at least 1 skull
Beat the fourth world with at least 2 skulls
Beat the fourth world with at least 3 skulls
Finish level 39 with at least 1 skull
Finish level 39 with at least 2 skulls
Finish level 39 with at least 3 skulls
Finish level 38 with at least 1 skull
Finish level 38 with at least 2 skulls
Finish level 38 with at least 3 skulls
Finish level 37 with at least 1 skull
Finish level 37 with at least 2 skulls
Finish level 37 with at least 3 skulls
Finish level 36 with at least 1 skull
Finish level 36 with at least 2 skulls
Finish level 36 with at least 3 skulls
Finish level 35 with at least 3 skulls
Finish level 35 with at least 2 skulls
Defeat 10 hell rabbit boss
Finish level 35 with at least 1 skull
Finish level 34 with at least 1 skull
Finish level 34 with at least 2 skulls
Finish level 34 with at least 3 skulls
Finish level 33 with at least 1 skull
Finish level 33 with at least 2 skulls
Finish level 33 with at least 3 skulls
Defeat 1 hell rabbit boss
Finish level 32 with at least 1 skull
Finish level 32 with at least 2 skulls
Finish level 32 with at least 3 skulls
Defeat 100 hell mob 1
Defeat 100 hell mob 2
Defeat 100 hell mob 4
Defeat 100 hell mob 3
Defeat 10 hell mob 4
Defeat 10 hell mob 2
Defeat 10 hell mob 1
Defeat 10 hell mob 3
Finish level 31 with at least 1 skull
Finish level 31 with at least 2 skulls
Finish level 31 with at least 3 skulls
Defeat 1 hell mob 4
Defeat 1 hell mob 2
Defeat 1 hell mob 3
Defeat 1 hell mob 1
Finish level 30 with at least 1 skull
Finish level 30 with at least 2 skulls
Finish level 30 with at least 3 skulls
Beat the third world with at least 1 skull
Beat the third world with at least 2 skulls
Beat the third world with at least 3 skulls
Finish level 29 with at least 2 skulls
Finish level 29 with at least 3 skulls
Finish level 29 with at least 1 skull
Finish level 28 with at least 1 skull
Finish level 28 with at least 2 skulls
Finish level 28 with at least 3 skulls
Finish level 27 with at least 3 skulls
Finish level 27 with at least 2 skulls
Finish level 25 with at least 1 skulls
Finish level 26 with at least 2 skulls
Finish level 26 with at least 3 skulls
Defeat 100 eletro fan 3
Defeat 100 eletro fan 4
Finish level 25 with at least 1 skull
Finish level 25 with at least 2 skulls
Finish level 25 with at least 3 skulls
Defeat 100 eletro fan 1
Finish level 24 with at least 1 skull
Finish level 24 with at least 2 skulls
Finish level 24 with at least 3 skulls
Defeat 100 eletro fan 2
Finish level 23 with at least 1 skull
Finish level 23 with at least 2 skulls
Finish level 23 with at least 3 skulls
Defeat 10 eletro boss
Defeat 1 eletro boss
Finish level 22 with at least 1 skull
Finish level 22 with at least 2 skulls
Finish level 22 with at least 3 skulls
Finish level 21 with at least 1 skull
Finish level 21 with at least 2 skulls
Finish level 21 with at least 3 skulls
Defeat 10 eletro fan 4
Defeat 10 eletro fan 3
Defeat 10 eletro fan 1
Defeat 10 eletro fan 2
Defeat 1 eletro fan 4
Defeat 1 eletro fan 3
Defeat 1 eletro fan 2
Defeat 1 eletro fan 1
Finish level 20 with at least 1 skull
Finish level 20 with at least 2 skulls
Finish level 20 with at least 3 skulls
Beat the second world with at least 1 skull
Beat the second world with at least 2 skulls
Beat the second world with at least 3 skulls
Finish level 19 with at least 1 skull
Finish level 19 with at least 2 skulls
Finish level 19 with at least 3 skulls
Finish level 18 with at least 1 skull
Finish level 18 with at least 2 skulls
Finish level 18 with at least 3 skulls
Finish level 17 with at least 2 skulls
Finish level 17 with at least 3 skulls
Finish level 17 with at least 1 skull
Accumulate 100000 coins
Accumulate 20000 coins in a single stage
Release a total of 50 specials
Finish level 16 with at least 1 skull
Finish level 16 with at least 2 skulls
Finish level 16 with at least 3 skulls
Defeat 1000 enemies
Finish level 15 with at least 2 skulls
Finish level 15 with at least 3 skulls
Defeat 10 country boss
Finish level 15 with at least 1 skull
Defeat 100 country fan 3
Defeat 100 country fan 4
Finish level 14 with at least 1 skull
Finish level 14 with at least 2 skulls
Finish level 14 with at least 3 skulls
Defeat 1 country boss
Defeat 100 country fan 2
Finish level 13 with at least 1 skull
Finish level 13 with at least 2 skulls
Finish level 13 with at least 3 skulls
Accumulate 50000 coins
Accumulate 15000 coins in a single stage
Defeat 100 country fan 1
Defeat 10 country fan 3
Finish level 12 with at least 2 skulls
Finish level 12 with at least 3 skulls
Finish level 12 with at least 1 skull
Defeat 10 country fan 4
Defeat 1 country fan 4
Defeat 1 country fan 3
Finish level 11 with at least 1 skull
Finish level 11 with at least 2 skulls
Finish level 11 with at least 3 skulls
Defeat 10 country fan 2
Defeat 1 country fan 2
Defeat 10 country fan 1
Defeat 1 country fan 1
Finish level 10 with at least 1 skull
Finish level 10 with at least 2 skulls
Finish level 10 with at least 3 skulls
Beat the first world with at least 1 skull
Beat the first world with at least 2 skulls
Beat the first world with at least 3 skulls
Finish level 09 with at least 1 skull
Finish level 09 with at least 2 skulls
Finish level 09 with at least 3 skulls
Accumulate 10000 coins in a single stage
Accumulate 25000 coins
Accumulate 5000 coins in a single stage
Sell a total of 20 speakers
Upgrade a "The Tremor" speaker to lvl3
Upgrade a "The Tower" speaker to lvl3
Upgrade a "The Tower" speaker to lvl2
Release a total of 25 specials
Finish level 08 with at least 1 skull
Finish level 08 with at least 2 skulls
Finish level 08 with at least 3 skulls
Finish level 07 with at least 1 skull
Finish level 07 with at least 2 skulls
Finish level 07 with at least 3 skulls
Defeat 10 popstar boss
Sell a total of 15 speakers
Sell a total of 10 speakers
Finish level 06 with at least 1 skull
Finish level 06 with at least 2 skulls
Finish level 06 with at least 3 skulls
Finish level 05 with at least 2 skulls
Finish level 05 with at least 3 skulls
Accumulate 10000 coins
Sell a total of 5 speakers
Finish level 05 with at least 1 skull
Defeat 1 popstar boss
Upgrade a "The Deployer" speaker to lvl3
Upgrade a "The Deployer" speaker to lvl2
Finish level 04 with at least 1 skull
Finish level 04 with at least 2 skulls
Finish level 04 with at least 3 skulls
Upgrade a "The Mass" speaker to lvl3
Upgrade a "The Mass" speaker to lvl2
Deploy a "The Mass" speaker
Deploy a total of 100 speakers
Defeat 100 pop fan 4
Upgrade a "The Omni" speaker to lvl3
Defeat 100 pop fan 3
Defeat 100 pop fan 2
Upgrade a "The Omni" speaker to lvl2
Finish level 03 with at least 3 skulls
Upgrade a "The Tremor" speaker to lvl2
Deploy a total of 75 speakers
Release a total of 10 specials
Finish level 03 with at least 2 skulls
Accumulate 5000 coins
Accumulate 2000 coins in a single stage
Deploy a total of 50 speakers
Finish level 03 with at least 1 skull
Upgrade a "The Roaming" speaker to lvl3
Defeat 10 pop fan 4
Upgrade a "The Roaming" speaker to lvl2
Finish level 01 with at least 3 skulls
Defeat 100 pop fan 1
Finish level 02 with at least 3 skulls
Release a total of 5 specials
Finish level 02 with at least 1 skulls
Deploy a "The Roaming" speaker
Finish level 02 with at least 1 skull
Finish level 02 with at least 2 skulls
Defeat 1 pop fan 4
Defeat 10 pop fan 3
Defeat 100 enemies
Upgrade a "The Freezer" speaker to lvl3
Defeat 1 pop fan 3
Deploy a total of 25 speakers
Finish level 01 with at least 1 skull
Defeat 10 pop fan 2
Upgrade a "The Shocking" speaker to lvl3
Upgrade a "The Freezer" speaker to lvl2
Deploy a "The Freezer" speaker
Deploy a "The Deployer" speaker
Release a total of 1 special
Deploy a total of 10 speakers
Deploy a "The Omni" speaker
Deploy a "The Tower" speaker
Sell a total of 1 speaker
Defeat 10 pop fan 1
Defeat 10 enemies
Defeat 1 pop fan 2
Upgrade a "The Shocking" speaker to lvl2
Defeat 1 pop fan 1
Deploy a "The Tremor" speaker
Deploy a "The Shocking" speaker