Here is the full list of all 35 Dungeon Munchies achievements.
Accumulate over 2000 intellect points
Defeat the Big Vine
Picked up a Guava
Complete Simmer's Orientation
Made some Fried Mozzies
Completed Chapter 1!
Complete all Chapter One recipes
Craft all Chapter One weapons
Defeat Clifford
Defeat the Lord Protector
Completed Chapter One with zero deaths
Reached the Surface
Revive Grill
Complete Chapter Two
Complete all Chapter Two recipes
Craft all Chapter Two weapons
Cut open the Core
Defeat the “Super Ultra Fruit Medley”
Defeated Mercury One
Help Grill Subdue Simmer
Replay Simmer's Recording on Snow Peak
Complete Chapter Three on Executive Chef Difficulty
Upgrade a Dish to the Max
Damage Big Vine's truck when rescuing Grill
Witness Putrid's return
Upgrade one of Simmer's dishes to the max
Make every dish at least once.
Make every weapon at least once.
Complete the Legendary Dish
Gain access to Rift Space
Give in to Putrid
Defeat the Terrortubby
Defeat Cone
Expend Putrid's energy in this dimension.
Completed the final chapter of Dungeon Munchies!