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