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 5 armors in your Arsenal.
Amass 5 helmets in your Arsenal.
Defeat Lord Vanaduke in the heart of the Firestorm Citadel.
Descend to the Core Terminal.
Alchemize a 5 star item.
Alchemize 50 items.
Earn clearance to explore Tier 3 of the Clockworks.
Alchemize 25 items.
Pay a visit to Emberlight, the town of gremlin outcasts.
Defeat the Roarmulus Twins.
Alchemize a 4 star item.
Defeat the Royal Jelly squatting in the Royal Jelly Palace.
Alchemize a 3 star item.
Amass 5 guns in your Arsenal.
Alchemize 10 items.
Complete a Tier 1 expedition without having to revive.
Amass 5 swords in your Arsenal.
Amass 3 guns in your Arsenal.
Amass 3 helmets in your Arsenal.
Hit an opponent with a snowball in Lockdown.
Amass 3 bombs in your Arsenal.
Obtain a Firecracker bomb.
Amass 3 swords in your Arsenal.
Earn clearance to explore Tier 2 of the Clockworks.
Alchemize 5 items.
Alchemize a 1 star item.
Amass 3 shields in your Arsenal.
Amass 3 armors in your Arsenal.
Use 10 Health Capsules.
Alchemize a 2 star item.
Use 10 Remedy Capsules.
Revive a downed party member.
Build an item to heat level 10.
Pay a visit to Moorcraft Manor.
Defeat the fabled Snarbolax that lives deep within the Gloaming Wildwoods.
Reach the first Clockworks Terminal.
Revive yourself.
Cross the chasm into Haven.
Successfully reach the Rescue Camp.
Amass 10 swords in your Arsenal.
Amass 10 guns in your Arsenal.
Amass 5 bombs in your Arsenal.
Amass 10 bombs in your Arsenal.
Amass 10 helmets in your Arsenal.
Amass 10 armors in your Arsenal.
Amass 5 shields 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.
Power up a derelict Mecha Knight.
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.