Here is the full list of all 21 Let the Cat in achievements.
Completed 50 locations!
Passed 40 locations with 3 stars!
Played 50 games!
Gained 100000 points!
Collected 100 stars!
Completed 20 locations!
Collected 40 stars!
Collected 250 stars!
Played 150 games!
Played 250 games!
Completed 10 locations with one object!
Completed 30 locations with one object!
Completed 50 locations with one object!
Completed 100 locations!
Passed 80 locations with 3 stars!
Passed 150 locations with 3 stars!
Gained 250000 points!
Gained 500000 points!
Used 25 hints!
Used 50 hints!
Used 75 hints!