Great War of Magellan
A space-faring science fiction RPG based on the comic book series of the same name. It is set in the Magellan Nebula¸ where a human civilization originating in the planet Kyron had established an interstellar confederation with nine governorships. Humanity was devastated by civil war and the post-war chaos¸ and evil alien spirit guides called the Nephilim that have turned species into war-mongering horrors including the Kitaan and the Dru-ack. It uses an original system where you roll 1d20¸ trying to get under attribute + skill but over difficulty. A second 1d20 determines special results. - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim