The legendary fighting franchise is back with over-the-top action, a wild cast of combatants, rocking reactive music, and C-C-C-COMBO BREAKERS!!! Choose your ultimate combatants each with fluid animations, unique combat tactics, and enthralling special attacks.
I kept encountering the same error but got it to work today. Try this: Hit the Menu button on Killer Instinct then go to ‘Properties…’ > ‘Compatibility’ > then mark ‘Force the use of a specific Steam Play compatibility tool’ and then select ‘Proton Experimental’ on the dropdown.
This worked, thank you!