Here is the full list of all 25 The Will of Arthur Flabbington achievements.
Bring flowers to one grave
Take 1000 steps with Jack
See one portrait
Read one epitaph
Start Act 2
Start Act 1
Read the How To Play section
Start Act 3
Get the treasure!
Kill 10 flies
Eat 10 donuts in one single game
Take 21097 steps with Jack
Read all epitaphs
See all portraits
Bring flowers to 10 graves
Ruin a love story
Request all songs
Reach 30 points in Farty Party
Make a "prosciutto e funghi" pizza
Make a "diavola" pizza
Make a "parmigiana" pizza
Make a "bomba" pizza
Get rejected as Kimberly
Try an exorcism
Lower the music volume in the settings in front of the metalhead kids