The Protagonist features an extensive branching narrative and turn-based tactical combat - each choice the player makes affects the course of the game. It stars a Special Operative with the Terran military force code named: Angel. Her current mission is to infiltrate an alien space station of the invading KL-T but all doesn't go as planned. She awakens in the infirmary of the space station she’s tasked with infiltrating and needs to figure out how to escape this place while it’s in full lockdown.