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