System agnostic

A system agnostic computing technology (or person, in the case of system administrators and programmers) is one that does not depend entirely on the ideology of another technology, as in "OS agnostic" or "editor agnostic."

The term system agnostic is also used in role-playing games to describe adventures and even entire campaign setting which can be used with a variety of role-playing game systems. It can also describe a player who is willing to play games which use any such system.