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