Here is the full list of all 33 Mido and Di achievements.
Clear all levels
Clean all the waves in gallery
Clean all the waves in basketball court
Clean all the waves in greenhouse
Clean all the waves in museum
Clean all the waves in office
Clean all the waves in soccer court
Clean all the waves in restaurant
Clean all the waves in coffee shop
Clean all the waves in server room
Collect 10000 coins
Clean all the waves in storages
Clean all the waves in stage
Clean all the waves in warehouse
Clean all the waves in classroom
Clean all the waves in store
Clean all the waves in library
Collect 2500 coins
Clean all the waves in gym
Clean a level by killing all the zombies with freezing them
Clean a level by killing all the zombies with the shock wave weapon
Buy all the upgrades for shock wave weapon
Clean a level by killing all the zombies with the fire weapon
Upgrade shock wave weapon twice
Upgrade shock wave weapon once
Buy all the upgrades for fire weapon
Buy all the upgrades for ice weapon
Clean all the waves in Mido's room
Upgrade fire weapon twice
Upgrade ice weapon twice
Upgrade fire weapon once
Upgrade ice weapon once
Collect 250 coins