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