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