Streets of Rage 4

Unlockable moves are unlocked by making progress in Survival Mode (part of the Mr. X Nightmare DLC). The more waves you clear, the more progress you make! Each character has at least 1 new move, some have up to 5 new moves, so if youre in a bit of a rush and just want this unlocked ASAP, your best bet is to play as any SoR 1 character as they only have one new move each (these characters are unlocked by scoring points throughout your entire cumulative campaign or arcade or stage select progress). Pick your favourite SoR1 character, and by the time you reach wave 20 or so, you should have made enough progress to unlock their new Star move and this achievement in the process!