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