Marked as 'completed', as much as an endless grind can be 'completed'. Fun and interesting as you explore the places to go and the story that's there, but the moment you reach any sort of endgame the grind sets in. Days of farming for one upgrade, frustrating design that doesn't let you know how you can even find which upgrade you need in order to progress, combat that can be brute forced with what feels like hacky and exploitative weapon modifications that eventually mean you hit a brick wall of feeling like you've made the best possible weapon you could get, but still not being able to do enough damage to kill the enemies that chase you through every level after a certain point.