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