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 bombs in your Arsenal.
Alchemize 50 items.
Amass 10 armors in your Arsenal.
Amass 10 shields in your Arsenal.
Travel the entire Clockworks from depth 0 to depth 29 in a single expedition.
Alchemize a 5 star item.
Amass 5 bombs in your Arsenal.
Amass 3 bombs in your Arsenal.
Alchemize 25 items.
Amass 5 guns in your Arsenal.
Alchemize a 1 star item.
Amass 10 helmets in your Arsenal.
Amass 3 guns in your Arsenal.
Descend to the Core Terminal.
Amass 10 swords in your Arsenal.
Hit an opponent with a snowball in Lockdown.
Defeat the Royal Jelly squatting in the Royal Jelly Palace.
Alchemize 10 items.
Amass 5 helmets in your Arsenal.
Alchemize a 3 star item.
Alchemize a 2 star item.
Alchemize 5 items.
Earn clearance to explore Tier 3 of the Clockworks.
Defeat the Roarmulus Twins.
Complete a Tier 2 expedition without having to revive.
Pay a visit to Emberlight, the town of gremlin outcasts.
Amass 5 armors in your Arsenal.
Amass 5 shields in your Arsenal.
Alchemize a 4 star item.
Amass 3 helmets in your Arsenal.
Amass 3 armors in your Arsenal.
Amass 3 shields in your Arsenal.
Obtain a Firecracker bomb.
Defeat the fabled Snarbolax that lives deep within the Gloaming Wildwoods.
Amass 5 swords in your Arsenal.
Earn clearance to explore Tier 2 of the Clockworks.
Complete a Tier 1 expedition without having to revive.
Amass 3 swords in your Arsenal.
Use 10 Remedy Capsules.
Power up a derelict Mecha Knight.
Pay a visit to Moorcraft Manor.
Build an item to heat level 10.
Use 10 Health Capsules.
Revive a downed party member.
Reach the first Clockworks Terminal.
Revive yourself.
Cross the chasm into Haven.
Successfully reach the Rescue Camp.
Amass 10 guns in your Arsenal.
Amass an Arsenal that includes a 5 star helmet, armor, shield, gun and bomb.
Unlock and fill every equipment slot.
Complete a Tier 3 expedition without having to revive.
Travel the entire Clockworks from depth 0 to depth 29 in a single expedition without having to revive.