Here is the full list of all 85 Sword Game achievements.
Win 1 game of versus
Win 10 games of versus
Win 25 games of versus
Win 50 games of versus
Get 50 total kills
Get 250 total kills
Get 1000 total kills
Get 100 slash kills
Get 100 stab kills
Get 100 successful parries
Get 50 throw kills
Get 25 environmental kills
Die to spikes 25 times
Die to fireblocks 15 times
Die to cannonballs 15 times
Die by going offscreen with 'stage loop' off 10 times
Die by getting crushed 5 times
Win a 'Sword' game without dying once
Win a 'Time' game with more than 15 kills per minute
Win a 'Lives' game faster than 5 seconds per life
Win a 'Flag' game where you have the least kills
Play on all default stages
Play a game with 4 (human) players
Win a game with each type of perma-power enabled
Win a game on 'Ship Battle' with the Cutlass
Play a game on Hazardous Tomb that lasts 5 minutes or longer
Stay alive on 'Hell' for a full minute with 3 CPU opponents
Reach 5000 % sword size
Kill 5 opponents whose sword size is over 2500 %
Kill an opponent who has killed you 10 times in a row
Win a game without missing an attack or wasting a parry
Get 3 kills with one attack
Do 25 wall jumps in one game
Throw your sword 20 times in one game
Get 10 kills within 10 seconds
Win a 1v3 against CPUs
Survive for 3 minutes on any difficulty
Survive for 5 minutes on any difficulty
Survive for 10 minutes on any difficulty
Earn a Bronze trophy on any difficulty
Earn a Silver Trophy on any difficulty
Earn a Gold trophy on any difficulty
Earn a Gold trophy on Normal
Earn a gold trophy on Hard
Earn a Gold trophy on Death
Kill 25 enemies in one game
Kill 50 enemies in one game
Kill 100 enemies in one game
Kill 150 SWATs
Kill 100 Vikings
Kill 100 Spartans
Kill 50 Ninjas
Kill 30 Firemen
Kill 20 Cyborgs
Kill 10 Knights
Get 5 kills with one attack
Get 7 kills with one attack
As Red, earn 50 aerial kills in a game
As Blue, get 10 kills with the beam power-up in one game
As Green, get a survival time of 3 minutes by doing absolutely nothing
As Yellow, stand on honey for more than half the game
Play 15 survival games where no one is Purple
As Orange, play a game where you spend more than 2 minutes running
As Pink, survive for 2 minutes on 'Solo' without attacking
As Teal, win any gold trophy with Green as an ally
As Brown, get the Wing power-up 3 times in a game
As Grey, get every type of power-up in one survival game
As Black, stay alive for 2 minutes on your last life
As White, earn at least a Silver trophy without using the screen loop
Earn the secret Platinum trophy (only available on Death)
Reach 15 minutes played
Reach 1 hour played
Reach 5 hours played
Play a game with every available color
Optain 100 power-ups
Create a custom stage
Don't attack for 1 minute in any mode
Stay in the victory screen for a full minute
Run 10 pixel kilometers with the Lightning power-up
Flap your wings 500 times with the Wing power-up
Shoot 250 beams with the Beam power-up
Get shielded 25 times by the Shield power-up
Get 25 kills without attacking with the Burn
Play a game of Pong