Slitherine

Is the combat mechanic Rock Paper Scissors type?

Thanks

It is and it isn't.
It is "spear works against anyone running at you" so, we broke up the standard "heavy infantry is always good against cavalry" in favour of "this weapon is good against that, magic is good against low morale, shields are good against missile, penetrating weapons such as spear are good against armour etc.
So it is more of logical combination following from equipment and it is also amended by positioning - spears break charges, but so do rivers, rough terrain etc.
Not sure if that answers your question, but I would say it is a more varied and open system than straight rock, paper, scissors.