The Baryon Project: a Lost Sci-Fi Shooter RPG with Spaceships bigger than SKYRIM's world. (Patreon)

Dark Matter: The Baryon Project is a cancelled sci-fi shooter RPG that was in development by Pixelcage, planned to be released for PC, Xbox 360 and PS3. The project was quite ambitious for a rather small and obscure team, promising to offer both on-foot first-person shooting and third person spacecraft combat. You would fight in space against huge spacecrafts planned to be up to 100 km (62 miles) in size – something that would be considered a massive open-world even by today’s standards (SKYRIM’s world is about 5 km wide), gigantic spaceships-worlds in which you could also break-in to continue attacking your enemies on foot: https://www.unseen64.net/2018/01/17/dark-matter-baryon-project-cancelled/