Here is the full list of all 18 Frederic: Evil Strikes Back achievements.
Complete any level while getting only perfect notes
Don't hit any note in one level
Complete the game on Hard level
Complete the game on Chopin level
Complete the game skipping all the cut-scenes
Complete the game without using super attacks
Comlete the final level
Complete the game on Easy level
Complete the game on Normal level
Complete level – Poland
Complete level - Russia
Complete level - Mongolia
Complete level - Sweden
Complete level - USA
Complete level - Argentina
Complete level - Greece
Complete level - UK
Complete level - Austria