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