NeonXSZ

NeonXSZ (2016): Shooter, Role-playing (RPG), Indie. Developed by Intravenous Software. Available on Linux, PC (Microsoft Windows), and Mac.

NeonXSZ is a remarkably agile first-person spaceship combat and exploration game with RPG-like loot and leveling. Offering both openworld freeform gameplay and tightly structured combat arenas, it's a single-player sandbox where the only limit is your imagination.