Here is the full list of all 54 Spiral Knights achievements. It takes around 200 hours to unlock all of the achievements on Windows.
Power up a derelict Mecha Knight.
Amass 10 shields in your Arsenal.
Amass 10 bombs in your Arsenal.
Alchemize 50 items.
Defeat the Royal Jelly squatting in the Royal Jelly Palace.
Amass 10 helmets in your Arsenal.
Amass 10 armors in your Arsenal.
Alchemize a 3 star item.
Amass 5 shields in your Arsenal.
Amass 10 guns in your Arsenal.
Pay a visit to Emberlight, the town of gremlin outcasts.
Alchemize 25 items.
Earn clearance to explore Tier 2 of the Clockworks.
Alchemize a 2 star item.
Defeat the fabled Snarbolax that lives deep within the Gloaming Wildwoods.
Amass 10 swords in your Arsenal.
Amass 5 bombs in your Arsenal.
Amass 3 shields in your Arsenal.
Use 10 Remedy Capsules.
Alchemize 10 items.
Amass 5 helmets in your Arsenal.
Amass 5 armors in your Arsenal.
Pay a visit to Moorcraft Manor.
Complete a Tier 1 expedition without having to revive.
Amass 3 bombs in your Arsenal.
Obtain a Firecracker bomb.
Alchemize 5 items.
Reach the first Clockworks Terminal.
Use 10 Health Capsules.
Amass 5 guns in your Arsenal.
Alchemize a 1 star item.
Amass 3 helmets in your Arsenal.
Amass 5 swords in your Arsenal.
Revive yourself.
Amass 3 guns in your Arsenal.
Cross the chasm into Haven.
Amass 3 swords in your Arsenal.
Amass 3 armors in your Arsenal.
Successfully reach the Rescue Camp.
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 an Arsenal that includes a 5 star helmet, armor, shield, gun and bomb.
Build an item to heat level 10.
Unlock and fill every equipment slot.
Revive a downed party member.
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.