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