Trying to add a game which is a x executable

I'm new to Linux and is trying to add game from itch.io to Heroic Game Launcher, but some game are application/x-executable that don't posses any extension and are not seen in the browser even when we use the all file type option. I've tried adding them directly by typing the location, create a launcher and using it to launch the game with heroic and I already looked if someone else post the problem but none of it worked. also, I tested both the game and the launcher to see if they work and they does.

System: Linux Mint