Here is the full list of all 12 Pinstripe achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Beat the game in less than an hour!
Catch 13 butterflies!
Get the Tommy Gun!
Beat the game without getting hurt!
Be a complete butt head.
Sniff out all the clues!
Kill every monster!
Warm George up!
Wear Mr. Pinstripe's suit!
Find all three secret rooms!
Collect 1,000 Frozen Drops!
Just be nice, OK?