I’m certainly sorry for your troubles but I’m not really seeing anything here compelling as to the idea of them purposely stealing something from you. It’s two games based on an actual scientific experiment. So of course the name is going to be the same cuz the name is based on the experiment. Of course the descriptions going to be similar because you’re describing the same experiment. The games themselves seem different enough that I have trouble believing you could convince anyone of theft here, particularly anyone at Steam.

There are a lot of games out there that are very similar. It’s just the nature of the thing. I agree with some other comments in here I think your best choice is to just change the name, maybe to something a little bit more memorable and original and rely on the fact that your product does look better. Certainly file an official Complaint if you feel it necessary, but I wouldn’t get your hopes up.