Equip a new weapon

Reach a score target

Defeat the first boss

"A group containing five members" - Perform a 5X chain

"A group of people who perform instrumental or vocal music" - Perform a 10X chain

Unlock Mezzo-piano difficulty

Unlock Mezzo-forte difficulty

Unlock Forte difficulty

Unlock Fortissimo difficulty

"Leader of the first violin section" - Reach the 4-bronze star rating on 10 songs

"Leads a musical ensemble by way of visible gestures" - Reach the 4-Silver star rating on 10 songs

"A title of extreme respect given to a master musician" - Reach the 4-gold star rating on 10 songs

"work" or "labour"; a number generally assigned by composers to an individual composition or set of compositions on publication, to help identify their works - Finish the game

"A large instrumental ensemble that contains sections of string, brass, woodwind, and percussion instruments" - Equip 4 different weapons simultaneously

Upgrade a weapon to level 5

"A note of shortened duration separated from the note that may follow by silence" - Find and equip the rare Sonic weapon

"A gradual increase in volume of a musical passage" - Find and equip the rare Charging weapon

"With spirit / vigor" - Get 100% completion and over 30,000 points at the Piano difficulty

"Warlike, bellicose, belligerent or combative" - Get 100% completion and over 30,000 points at the Mezzo-forte difficulty

"Bang the piano with the fist" - Get 100% completion and over 30,000 points at the Fortissimo difficulty

"Sustained, lengthened" - Reach 30,000 points and finish without dying at the Piano difficulty

"Obstinate, persistent; a short musical pattern that is repeated throughout an entire composition" - Reach 30,000 points and finish without dying at the Mezzo-forte difficulty

"Always" - Reach 30,000 points and finish without dying at the Fortissimo difficulty

"Ignited / on fire" - Perfect game (100% + no death) and over 30,000 points at the Piano difficulty

"With fire / in a fiery manner" - Perfect game (100% + no death) and over 30,000 points at the Mezzo-forte difficulty

"Performing with exceptional ability, technique, or artistry" - Perfect game (100% + no death) and over 30,000 points at the Fortissimo difficulty

Play 840 minutes

"Silent; do not play" - Get 0% completion

Symphony No. 5 in C minor, Op. 67 (hint: 67 is the key)