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