Here is the full list of all 50 Shovel Knight Dig achievements.
Complete the tutorial
Wield 5 relics
Dig through the Mushroom Mines.
Discover 20 secret rooms along the well's sides.
Open the Drill Capsule 10 times.
Buy your first item.
Post a score on the Leaderboard.
Acquire a new set of armor.
Choose 5 risky paths at the bottom of the well.
Hatch 5 creatures from eggs.
Have 20000 gems on hand.
Defeat 12 enemies in a row using the Shovel Drop without touching the ground.
Spend a combined total of 20000 gems in the shops at the surface.
Finish the game.
Earn every Shovel Blade technique from Master Argus.
Defeat 5 foes at once using the War Horn.
Run over 5 enemies using the Mobile Gear Drill in one go.
Defeat an enemy with the Flameo Wand from more than 8 blocks away.
Descend 50 blocks in a Coffer of Safekeeping.
Defeat a boss with a level 5 Morph Lance.
Freeze Dozedrake with the Blizzeo Wand.
Use the Gusteo Wand to push an enemy into a hazard.
Deflect a Throwing Trowel to defeat 3 enemies.
Retrieve a money bag using the Reverse Exa.
Defeat 2 enemies with one cast of the Shadow Locket.
Absorb 3 hits using the Bubble Frog.
Defeat 3 enemies using the Rising Dagger without hitting the ground
Finish any stage without taking damage.
Finish the game without spending any gems.
Finish a world without eating any food.
Don't collect any gems in one stage.
Finish a level and swing the Shovel Blade fewer than 3 times, including digging.
Find all the secrets in one world.
Use a glass key acquired from a previous world in a new world.
Defeat an enemy as Tiny Shovel Knight.
Beat the game without using any relics.
Beat the game within 25 minutes.
Emerge unscathed from a battle with any Hexcavator.
Collect all 9 cogs in a world.
Electrocute 3 enemies at once.
Purchase or unlock all relics, armors, and accessories.
Defeat an enemy using 5 different relics.
Finish the game having seen every world in one run.
Help Altius in three locations in the Mushroom Mines.
Disable the Omega Saw.
Clean off a Mud-Encrusted Relic without using it.
Finish off Spore Knight with her own hat.
Defeat Hive Knight without hitting Fleck.
Hit Master Argus with a surprise attack.
Have two different follow pets at one time!