Here is the full list of all 46 Ratty Catty achievements.
Finish Training
Turn yourself into a walking airplane ✈
Drive vehicle fast through hole in bedroom
Get on the parrot
Drive at least one car
Find and drive hidden monster car
Play RatMan and make 25 scores
Play RatMan and make 50 scores
Play RatMan and make 75 scores
Play RatMan and make 100 scores
Reach Level 10
Reach Level 20
Reach Level 30
Reach Level 40
Reach Level 50
Reach Level 60
Reach Level 70
Reach Level 80
Reach Level 90
Reach Level 100
Find and use egg gun
Find and use water balloons
Find and use hammer
Find and use screwdriver
Find and use umbrealla
Find and use TNT
Find and use crowbar
Find and use boxing glove
Find and use cue
Find and use pan
Find and use racket
Find and use kitchen lighter
Find and use plate
Find and use fork
Find and use butter knife
Find and use knife
Find and use spray as a jetpack
Find and use propeller hat as a jetpack
Find and use magic broom as a jetpack
Find and use fire extinguisher as a jetpack
Find and use fan as a jetpack
Find and use spring shoes as a jetpack
Find and use toy truck
Kill Ratty
Give baby a food
Use the elevator on the nest