Open a terminal in the game folder, then:
chmod +x "./My Dystopian Robot Girlfriend.x86_64"
Yes, chmod
is a shell command that let you change mode flags and access permission of a file. The +x
indicate to the command to make the specified file executable.
Says it’s a read only file
In that case, add sudo
(substitute user, do) before chmod
to make it run with administrator permissions (a password may be required).