Here is the full list of all 69 Wrack achievements.
Defeat Geizer.
Defeat Mechron.
Defeat Gnash.
Defeat Giggordo and rescue Starlyn (episode 1).
Defeat Oculus.
Defeat Galactron.
Earn a gold medal on any level.
Earn a platinum medal on any level.
Earn a tyderium medal on any level.
Earn a gold medal on every level (episode 1).
Earn a platinum medal on every level (episode 1).
Earn a tyderium medal on every level (episode 1).
Complete episode 1 with a score of 5,000,000 or higher.
Complete episode 1 in 60 minutes or less.
Earn a kill chain of 4x or more.
Earn a kill chain of 16x or more.
Earn a kill chain of 25x or more.
Earn a kill chain of 40x or more.
Earn a kill chain of 69x.
Earn a kill combo of 2x or more.
Earn a kill combo of 4x or more.
Earn a kill combo of 6x or more.
Earn a kill combo of 8x or more.
Gib 2 or more monsters in a single kill combo.
Gib 4 or more monsters in a single kill combo.
Gib 6 or more monsters in a single kill combo.
View an item in the gallery.
Complete a map in Time Attack mode.
Share a Wrack creation of yours through Steam Workshop.
Start the game using a code to give you 30 lives.
Increase either your max. health or max. armor.
Increase both your max. health and armor by 50.
Raise both your health and armor to 250.
Complete a level using only the Hyperblade.
Gib 4 or more monsters in a single combo using a toxic barrel.
Have two Arcturans kill each other via infighting.
Poor kitty! :(
Survive a bazooka jump without the Blast Guard.
Survive a bazooka jump with the Blast Guard.
Find a BIG secret!
Kill a kamikaze using the Hyperblade without taking damage.
Obtain a jackpot.
Earn a kill chain of 3x on sentries using the pistol.
Gib every single enemy on any level.
Complete a map in Score Attack mode.
Complete episode 1 without using a continue.
Complete episode 1 on "Medium" or higher.
Complete episode 1 on "Hardcore" or higher.
Complete episode 1 on "Bullshit!".
Discover the Power Core.
Complete E1L1 with the minimum amount of kills possible.
Watch a replay off of the leaderboard.
Slice up a monster that didn't see you coming!
Kill an idle kamikaze using the crusher's counterattack.
Reset your kill chain timer by gibbing a corpse.
Complete a map you've subscribed to through Steam Workshop.
End a kill chain with a finisher.
End a kill chain with a level 4 finisher.
Kill a monster with the Hyperblade finisher's slash and another with its projectile.
Kill two or more Arcturan soldiers with the pistol's finisher.
Kill a full-health crusher with the shotgun's finisher.
Kill 10 or more monsters with the Pulsar's finisher.
Survive a bazooka jump with the bazooka's level 4 finisher AND the doomsphere.
Beat your previous high score on any map.
Complete episode 1 having killed all of the monsters.
Complete episode 1 having collected all of the treasure.
Complete episode 1 having found all of the secrets.
Kill Geizer with a single shot.
Reset your kill chain timer by gibbing a corpse right before it expires.