Here is the full list of all 38 Shadow Warrior 3 achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Obtain all upgrades
Fully upgrade the katana
Put 50 enemies on spikes
Complete 'Intestinal Inspector'
Electrocute 50 enemies without Motoko's help
Perform Finisher 100 times
Set 25 enemies on fire
Complete 'Midnight Snack'
Complete 'The Fast and the Furry'
Obtain all Gore Tool types
Obtain "Double Trouble" Gore Tool from Gassy Obariyon.
Complete 'Wayfarer's Forest'
Fully upgrade one character skill branch
Fully upgrade a ranged weapon
Complete 'Doomsday Device'
Kill 100 enemies with Gore weapons
Obtain "Hungry, Hungry Heart" Gore Tool from Chef Oboru Guruma.
Complete 'Egg Express'
Kill 150 enemies with environmental hazards
Freeze 75 enemies
Complete 'Walking on Eggshells'
Obtain "Blade of Hattori" Gore Tool from Hattori.
Kill 100 enemies with the katana
Complete 'That Damn Dam'
Obtain "Swarm Launcher" Gore Tool from Slinky Jakku.
Explode 50 explodables
Obtain "Disco Grenade" Gore Tool from Laser Shogun.
Obtain "Seeking Eye" from Seeking Shokera.
Complete 'Motoko's Thunderdome'
Obtain "Penetrator" Gore Tool from Mogura.
Perform Finisher 15 times
Complete 'Way to Motoko'
Kill 200 enemies
Obtain "Equalizer" Gore Tool from Oni Hanma.
Obtain "Brain Tonic" Gore Tool from Shogai.
Obtain your first upgrade
Complete 'The Dragon's Back'
Obtain "Brain Freeze" Gore Tool from Kugutsu.