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