The correct and formal solution.
Register the name of your game as a trademark (you must first check that the name you want to use does not exist).
If another game uses your name, hire a lawyer to send a cease and desist letter to its creators, and perhaps a DMCA to Itch to get the game taken down. However, you may need to go to court if the creator believes your claim is incorrect.
By the way, doing all this does not guarantee that you will win the trial, since this depends on several factors.
Aren't you a large company with a large marketing budget and a legal department?
DO NOT choose generic names or names inspired by generic elements, maybe "zombie operator" sounds cool to you, but it is a generic name that thousands of developers will also think is cool and will name their games that way (And surely , many have done it before you even thought about it, that is, strictly speaking, if those people have registered the name, it is possible that you cannot use it). Furthermore, since they are generic words, it is difficult to register them.