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