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