The Cybrid campaign starts with their invasion across the outer colonies and proceeds to Earth, ending in an assault on the Imperial palace to kill Petresun.

As a simulation, Starsiege offers players the ability to pilot a wide variety of massive bipedal war machines known as HERCULANs (Humaniform-Emulation Roboticized Combat Unit with Leg-Articulated Navigation) (or 'HERCs' for short), as well as several tanks.

Starsiege takes place across a number of planets and moons in the Solar System, offering a range of different locations throughout the game and in multiplayer battles, including Earth, Titan, Luna, Mars, Venus, and Mercury.

Starsiege abandoned the "torso-twist" gameplay mechanic common in many mecha simulations (including preceding games in the series), a feature that would normally allow the user to swivel the HERC's upper body independently of its legs.

In Starsiege, torso orientation is fixed forward, but the player can move the aiming recticle across the screen with a mouse, a feature GameSpot compared to playing a first-person shooter.

[8] IGN highlighted the well presented package and cutscenes, graphically impressive (whilst sparse) landscapes, intuitive controls and the longevity of the multiplayer mode.

The minimal sound effects were criticised, with muddled voice-overs, and some of human HERC models were felt to be a bit bland and generic.

[6] GameSpot said, "Starsiege brings new life to a genre otherwise devoid of it, even if it doesn't really succeed in elevating robot sims out of their long-term rut.

"[5] Next Generation called it "a worthy successor to the Earthsiege series [that] should be just as attractive to fans of Heavy Gear or Mechwarrior II [sic].

Calling these figures "pitiful", Mark Asher of CNET Gamecenter wrote, "Sierra gave this game a big push and it just didn't sell, and now most of Dynamix is gone.

[4][23] In September 2022, Prophecy Games announced Starsiege: Deadzone, a first-person PvP and PvE looter shooter with procedurally generated environments.