From the publisher (Eilfin Publishing):
Undiscovered: The Quest for Adventure is a Fantasy Role-Playing Game designed with a medieval setting. This game is not a d20 game. Actually, the game does not require the use of a 20 sided die whatsoever. Undiscovered is a percentile based system. All attribute scores, skills, and attacks are based off a percentage. Another identifying factor of this system is that it is not a class based system. With no classes, you gain the freedom you've always wanted to create your character. There are very few restrictions in this game, and most of those are based only on the god or goddess you choose to follow. Restrictions do not come in the way of skills you can use (magic, psionics, fighting, etc.) but rather in the groups of miracles you are able to use (deities allow only certain miracle groups for their followers). Besides this, you can learn any skills you desire. Additionally, you are not stuck with the skills with which you start. As you advance levels, you gain points that you can spend to learn new skills and increase the levels of your current skills.
Speaking of advancing, this system has no limit on character levels! However, you can only advance so far... Once you run out of skills to learn, and have advanced all of your skills to their maximum level, there is really nowhere else to go. But even to do this, you would be well past character level 500, and it would take you an awfully long time to reach that goal.