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