Here is the full list of all 28 Ninja Pizza Girl achievements.
Complete the Ninja Pizza Girl story
Complete "Loser Town"
Complete "R-E-S-P-E-C-T"
Start a delivery with the lowest possible self-esteem and successfully deliver the pizza
Successfully attack 100 ninjas
Complete "Poverty Bites"
Complete "For Love of Pizza"
Buy a video game
Have a cup of tea, some chocolate or a nice hot bath
Complete "Fear of Falling"
Be "in the zone" for 30 continuous seconds
Complete “No Pants No Pizza”
Make an outfit
Safely fall 10 metres
Use the difficulty options
Make all the outfits
Buy ALL the video games
100% game completion
Deliver a pizza in First Person Mode
Deliver a pizza in a R-E-S-P-E-C-T level without attacking a single rival ninja
Fail and retry a level 10 times
Deliver a pizza in an A+ time
Deliver a pizza in a time that's Beyond Classification
Deliver 100 pizzas
Deliver 1,000 pizzas
Fall out of the map
Deliver all pizzas in a time that's Beyond Classification
Safely fall 40 metres