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
Put 50 enemies on spikes
Complete 'Intestinal Inspector'
Perform Finisher 100 times
Complete 'Midnight Snack'
Fully upgrade the katana
Complete 'The Fast and the Furry'
Obtain all Gore Tool types
Obtain "Double Trouble" Gore Tool from Gassy Obariyon.
Complete 'Wayfarer's Forest'
Electrocute 50 enemies without Motoko's help
Kill 100 enemies with Gore weapons
Complete 'Doomsday Device'
Obtain "Hungry, Hungry Heart" Gore Tool from Chef Oboru Guruma.
Set 25 enemies on fire
Fully upgrade one character skill branch
Complete 'Egg Express'
Kill 150 enemies with environmental hazards
Freeze 75 enemies
Explode 50 explodables
Complete 'Walking on Eggshells'
Fully upgrade a ranged weapon
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.
Obtain "Disco Grenade" Gore Tool from Laser Shogun.
Obtain "Seeking Eye" from Seeking Shokera.
Complete 'Motoko's Thunderdome'
Obtain "Penetrator" Gore Tool from Mogura.
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.