Here is the full list of all 17 Old Coin Pusher Friends 2 achievements.
Defeat a yokai for the first time.
Defeat a yokai level 10 or higher.
Defeat a yokai level 20 or higher.
Defeat a yokai level 30 or higher.
Defeat a yokai level 40 or higher.
Defeat a yokai level 50 or higher.
Defeat a yokai level 60 or higher.
Hit the jackpot.
Upgrade box expansion to level 1.
Upgrade move speed to level 1.
Upgrade jackpot conversion to level 1.
Reduce firing interval to level 1.
Upgrade attack power to level 1.
Upgrade vacuum ability to level 1.
Install a prize pt booster.
Install a sub-shooter.
Install a flag.