Gaia Saga Universal Role-Playing System Core Rulebook (2nd Edition) (2011)

From RPG description here on RPGGeek:
Gaia Saga is a universal role playing system designed to be as flexible as possible for its players so that they can have a unique and truly original experience each time they start a new game. This rulebook contains everything you need to play, and has many features unavailable in more popular commercial games. Give it a try and see how Gaia Saga measures up.

Gaia Saga offers rich and detailed rules for every niche of gaming and can easily be converted into any number of different types of games. Its flexibility lies in its dice system, one which allows you to combine different forms of dice together so that you can far exceed a single D20. This system allows characters to continue to grow more powerful and skillful, meaning that they can exceed the limits of mortal men and women and can become legendary beings in the Mortal Realm, possibly even rivaling those of the Gods themselves.

This is a universal system, and can be used as basis for other game ideas such as Sci-Fi, Horror, Super Hero, Fan-Based such as movie adventures or anime, or any number of possibilities.