From publisher blurb:
Polymorph is an RPG platform. It’s a not a universal rules engine, or even a game in itself. Polymorph is a tool kit and development assets, that gives you everything that you need to build your own RPGs! Polymorph eliminates complex systems and esoteric rules in favor of an elegantly simple yet satisfying core rule – you always roll the same die to see what happens.
Polymorph builds on the past with its eyes to the future – creating a game system that is the same whether you are playing it at the table, playing it online, or watching others play via streaming.
Polymorph RPGs are modern, rules-lite games designed to allow for strong, narrative game play. Each Polymorph game is built using the same “you always roll your die” mechanics – but with a specific game built to emulate and deliver the experience for that game.
At its core, Polymorph provides a framework for resolving actions, creating interesting characters that have mechanical differences, and provides a structure for building up and emulating group stories. Each Polymorph Game brings to it some specific layers that are important for emulating that story shape, for telling that kind of story.