Here is the full list of all 54 Spiral Knights achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Amass 10 bombs in your Arsenal.
Amass 10 shields in your Arsenal.
Amass 10 armors in your Arsenal.
Alchemize 50 items.
Amass 10 helmets in your Arsenal.
Amass 10 guns in your Arsenal.
Defeat the Roarmulus Twins.
Defeat Lord Vanaduke in the heart of the Firestorm Citadel.
Amass 10 swords in your Arsenal.
Amass 5 bombs in your Arsenal.
Amass 5 guns in your Arsenal.
Hit an opponent with a snowball in Lockdown.
Alchemize a 1 star item.
Earn clearance to explore Tier 3 of the Clockworks.
Amass 5 shields in your Arsenal.
Descend to the Core Terminal.
Alchemize 25 items.
Complete a Tier 2 expedition without having to revive.
Amass 5 armors in your Arsenal.
Defeat the Royal Jelly squatting in the Royal Jelly Palace.
Alchemize a 5 star item.
Amass 3 bombs in your Arsenal.
Alchemize a 4 star item.
Pay a visit to Emberlight, the town of gremlin outcasts.
Amass 5 helmets in your Arsenal.
Amass 5 swords in your Arsenal.
Alchemize 10 items.
Power up a derelict Mecha Knight.
Alchemize 5 items.
Alchemize a 3 star item.
Revive a downed party member.
Earn clearance to explore Tier 2 of the Clockworks.
Obtain a Firecracker bomb.
Amass 3 armors in your Arsenal.
Use 10 Remedy Capsules.
Pay a visit to Moorcraft Manor.
Complete a Tier 1 expedition without having to revive.
Defeat the fabled Snarbolax that lives deep within the Gloaming Wildwoods.
Amass 3 shields in your Arsenal.
Use 10 Health Capsules.
Alchemize a 2 star item.
Amass 3 helmets in your Arsenal.
Build an item to heat level 10.
Amass 3 swords in your Arsenal.
Amass 3 guns in your Arsenal.
Revive yourself.
Reach the first Clockworks Terminal.
Cross the chasm into Haven.
Successfully reach the Rescue Camp.
Amass an Arsenal that includes a 5 star helmet, armor, shield, gun and bomb.
Unlock and fill every equipment slot.
Complete a Tier 3 expedition without having to revive.
Travel the entire Clockworks from depth 0 to depth 29 in a single expedition.
Travel the entire Clockworks from depth 0 to depth 29 in a single expedition without having to revive.