Interstellar Marines

Interstellar Marines is a discontinued science fiction first-person shooter video game that was developed by indie studio Zero Point Software until 2019. It was added to Steam Greenlight on September 3, 2012 and later released on Steam Early Access on July 2, 2013. Interstellar Marines was being developed in four acts, formerly planned as individual titles. The first act, code-named "Prologue", was in development and took place in a future military training facility that staged multiplayer, single-player, and cooperative training scenarios. Multiplayer was the first feature of Prologue to be built, doubling as both a tech foundation for future co-op missions and as a playable Early Access release on Steam. The first co-op mission, titled The NeuroGen Incident, was released on September 26, 2014 which built much of the technology needed for intended future co-op campaigns. The three envisioned acts after Prologue, collectively titled the "Trilogy", would have been narrative-driven campaigns spanning a continuous story arc set in "a realistic and unpredictable future where first contact with another sentient species is slowly becoming reality." The campaigns would have supported single-player and up to four players in drop-in/drop-out co-op. Zero Point Software claims that their co-op campaign would have featured tactical game-play, role-playing elements, open-ended level design, and a compelling sci-fi storyline. It claims to pay homage to old-school tactical first person shooters like Rainbow Six 3: Raven Shield and cites System Shock 2 and Deus Ex for their action RPG elements and open-ended levels, as well as Half-Life for its first person narrative-driven storytelling.