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