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 an Arsenal that includes a 5 star helmet, armor, shield, gun and bomb.
Hit an opponent with a snowball in Lockdown.
Travel the entire Clockworks from depth 0 to depth 29 in a single expedition.
Complete a Tier 3 expedition without having to revive.
Travel the entire Clockworks from depth 0 to depth 29 in a single expedition without having to revive.
Unlock and fill every equipment slot.
Alchemize 50 items.
Alchemize a 5 star item.
Defeat Lord Vanaduke in the heart of the Firestorm Citadel.
Alchemize 25 items.
Earn clearance to explore Tier 3 of the Clockworks.
Descend to the Core Terminal.
Alchemize 10 items.
Complete a Tier 2 expedition without having to revive.
Alchemize a 4 star item.
Defeat the Royal Jelly squatting in the Royal Jelly Palace.
Alchemize a 3 star item.
Amass 10 armors in your Arsenal.
Amass 5 armors in your Arsenal.
Amass 10 shields in your Arsenal.
Amass 5 shields in your Arsenal.
Amass 10 helmets in your Arsenal.
Amass 5 helmets in your Arsenal.
Amass 10 bombs in your Arsenal.
Amass 5 bombs in your Arsenal.
Amass 3 bombs in your Arsenal.
Amass 10 guns in your Arsenal.
Amass 5 guns in your Arsenal.
Amass 10 swords in your Arsenal.
Pay a visit to Emberlight, the town of gremlin outcasts.
Defeat the Roarmulus Twins.
Complete a Tier 1 expedition without having to revive.
Earn clearance to explore Tier 2 of the Clockworks.
Alchemize 5 items.
Amass 5 swords in your Arsenal.
Alchemize a 2 star item.
Alchemize a 1 star item.
Amass 3 shields in your Arsenal.
Use 10 Remedy Capsules.
Use 10 Health Capsules.
Defeat the fabled Snarbolax that lives deep within the Gloaming Wildwoods.
Build an item to heat level 10.
Obtain a Firecracker bomb.
Pay a visit to Moorcraft Manor.
Revive yourself.
Reach the first Clockworks Terminal.
Revive a downed party member.
Power up a derelict Mecha Knight.
Cross the chasm into Haven.
Amass 3 armors in your Arsenal.
Amass 3 helmets in your Arsenal.
Amass 3 guns in your Arsenal.
Amass 3 swords in your Arsenal.
Successfully reach the Rescue Camp.