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
Perform Finisher 100 times
Put 50 enemies on spikes
Complete 'Intestinal Inspector'
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'
Complete 'Doomsday Device'
Fully upgrade one character skill branch
Freeze 75 enemies
Obtain "Hungry, Hungry Heart" Gore Tool from Chef Oboru Guruma.
Kill 100 enemies with Gore weapons
Complete 'Egg Express'
Kill 150 enemies with environmental hazards
Set 25 enemies on fire
Complete 'Walking on Eggshells'
Fully upgrade a ranged weapon
Electrocute 50 enemies without Motoko's help
Kill 100 enemies with the katana
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'
Perform Finisher 15 times
Obtain "Penetrator" Gore Tool from Mogura.
Obtain "Disco Grenade" Gore Tool from Laser Shogun.
Complete 'Way to Motoko'
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.