If you've played D&D or Pathfinder or something similar, S0urce C0de draws inspiration from them, but with a futuristic setting. However, it's designed to allow enough freedom to use it's rules and setup for many other d20 systems. You could adapt S0urce C0de to work in a Pathfinder game, or a Metro, etc.
The official Player Handbooks finally made it through the mail (my wife's name is proudly boasted on the backer's page) and they are working on a GM Handbook, Bestiary and Beastmen Handbook. All three of which are given to the backers for free in digital form.
In Gabriel's own words: A tabletop roleplaying game where science fiction meets fantasy, where running the game is as fun as playing in it! In a universe where the planets the number of planets seem endless and the amounts of adventures follow. Focus upon exploration and discovery or become a member of an elite force focused on law & order. Create your character focused on a multitude of things that don't have to rely on combat, but expanding into botany, science, technology, or more. In the worlds of S0urce C0de, you create your own pathways for your stories. In our world, the source code is something is essentially the backbone. A collection of instructions. We want this game to be your instructions on creating your own story and then taking it from there even further.
The project has been fully backed, but you can read more about it here: https://www.kickstarter.com/projects/altomvisual/s0urce-c0de-a-tabletop-roleplaying-game?ref=profile_backed
You can get the free version of the player handbook and full characters sheets here: https://s0urcec0derpg.wordpress.com/downloads/
To me, what makes this so unique and special is it's adaptability to other d20 systems, and while arguably, all d20 systems are adaptable to each other, this one feels more like it's trying to help you create your own stories based around the characters that are built, rather than building characters around a story.