Here is the full list of all 27 Weebish Mines achievements.
Stay at the Hospital
Ride a mine cart
Take a pickaxe and smash some dirt!
Buy somethin', will ya!?
Save Lucy
Save Penny
Save Captain
Save Starve-O
Get a gun from the mines
Make a wish at the wishing well
Locate the improved map
Find the magic blueberry
Kill the ultimate Dragon
Kill the mechanical bear
Kill the Queen!
Kill the giant catfish
Get a Thunderblade from the mines
Get a skull from the mines
Get a diamond from the mines
Collect $99
Get the family to experience level 10
Locate the mysterious Weebinizer!
Win the game, you crazy guy you
Buy a bomb from "Al's Explosives"
Kill the ruler of the undead!
Save a family member from their statued state!
Win the game in less than an hour!