Solipstry is a D20 role playing game system that allows you to create any world you can imagine.
Wild humans who worship a crashed star ship? Yep. Mermaids struggling against communism? Yep. Fantasy medieval? Yep. Pirates fighting a dinosaur incursion? Absolutely.
Solipstry gives you freedom to create the world that is in your mind, and by cutting down on crunchy, complicated math and unnecessarily complex dice rolls, Solipstry lets players become immersed in the worlds you have always wanted to build.
So, go ahead, create a story around telekinetic sharks and pyrotechnic mishaps. Solipstry will be right there with you.