Here is the full list of all 14 Woof Blaster achievements.
Kill a boss solely with regular bullets
Rage 5 times during a level
View the credits
Finish the game without using power-ups
Collect all slices of pizza and become King of the Dog Planet
Buy all power-ups
Buy 5 extra hearts
Buy all bullet typess
Lose the game by letting the cat get the pizza
Have £1000 at the beginning of a level
Obtain no money during a level
Take no damage during a level
Buy all rage forms
Figure out how to unlock cheat mode