Here is the full list of all 11 Cat Search in Medieval Times achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Found 5 cats
Found 10 cats
Found 20 cats
Found 40 cats
Found 75 cats
Found 100 cats
You found all the cats! Congrats!
Find all 120 cats without using hints
Found 1 hidden wanted poster
Found 3 hidden wanted posters
Found all the hidden wanted posters