Start Cuphead and make sure both players own the game on the same platform
Use the same version of the game on both systems
Connect both controllers to the same device for local co-op, or use the platform’s supported online play method if available
Launch the game and select a save file
Enable co-op by having the second player press the start/join button at the title screen or in-game when prompted
Play through the story together and defeat bosses to progress
Complete all main worlds and final bosses
Collect all coins in each run
Buy all items from Porkrind’s Emporium
Defeat every boss on Regular difficulty
Defeat every boss on Expert difficulty after finishing the game
Achieve S-ranks on bosses by meeting score requirements
Complete Run and Gun stages without taking damage when needed for better ranks
Parry enough pink objects to unlock related achievements
Revive your partner with the extra heart charm when possible
Use different weapons and charms to help clear all bosses efficiently
Finish all Mausoleum stages to unlock Super Arts
Defeat secret or optional bosses if required for remaining achievements
Check the achievement list regularly to track missing goals
Repeat any missed requirements in a new run or on replayed bosses
Make sure both players stay connected until achievements are saved
Sync save data or platform achievements after each session
Verify all achievements unlocked in the platform’s trophy or achievement menu