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