Here is the full list of all 40 CAN BULLET achievements.
Defeat Cans by a total of 100
Defeat Cans by a total of 1,000
Defeat Cans by a total of 3,000
Defeat Cans by a total of 10,000
Defeat Cans by a total of 20,000
Earn 80 crowns
Earn 160 crowns
Earn 240 crowns
Clear Wave 15 using Revolver
Clear Wave 15 using Machine Gun
Clear Wave 15 using Shot Gun
Clear Wave 15 using Grenade
Clear Wave 15 using Bat
Clear Wave 15 using Katana
Clear Wave 15 using Flame Gun
Clear Wave 15 using Charge Shot
Clear Wave 30 using Revolver
Clear Wave 30 using Machine Gun
Clear Wave 30 using Shot Gun
Clear Wave 30 using Grenade
Clear Wave 30 using Bat
Clear Wave 30 using Katana
Clear Wave 30 using Flame Gun
Clear Wave 30 using Charge Shot
Shoot down the boss that appears in the 10th Wave
Shoot down the boss that appears in the 15th Wave
Shoot down the boss that appears in the 20th Wave
Shoot down the boss that appears in the 25th Wave
Shoot down the boss that appears in the 30th Wave
During 1 play, Coins in possession exceeds 1000
During 1 play, Number of rerolls exceeds 30
During 1 play, Number of power-up purchases exceeds 50
During 1 play, Magazine size reaches +30
During 1 play, Critical rate reaches +50%
During 1 play, Attack power reaches +100%
During 1 play, Reload time is reduced below 50%
During 1 play, Reloading time is increased by more than 50%
Clear the Wave with 1 heart remaining
At the time of reaching 10 Wave, Missing out on quite a few cans
At the time of reaching 10 Wave, Almost all the cans have been destroyed