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