How i Open A .mrs File. Please i need to know.?

There are 3 different kinds of .mrs files. Since I don't know if its from Clone remover, the game Gunz, or Word perfect. I can't be much more help. I got the details from this site: a href="http://filext.com/file-extension/MRS" rel="nofollow"http://filext.com/file-extension/MRS/a