Here is the full list of all 19 River City Girls Zero achievements.
KO Gouji.
Escaped prison.
KO Daiki.
Misako has joined the team.
KO Ryuta.
Kyoko has joined the team.
Ride the Roller Coaster.
KO Shinji at the Amusement Park.
Reach Pier 13.
KO Shinji at the Warehouse.
Reach Roppongi.
KO Kinji.
Reach Shinjuku.
KO Misuzu in the Pachinko Parlor.
Survive a drop off a rope bridge.
KO Misuzu in Izu.
KO Ken.
KO Sabu.
Complete the game.