Belt Raider forces the player to solve two entirely different mechanical problems simultaneously, fusing Inertial Vector Flight with Reverse Tower Defense. These are the two types of games that meets the challenge expectation. 

You are the vanguard pilot navigating a physics-driven gunship through (Inners) corporate and Martian automated defense rings. Success requires mastering Newtonian drift to exploit the blind spots of static, heavy-artillery outposts anchored to tumbling space debris.

Take the helm of an agile Tanto2 vanguard gunship called Hellya, in a gritty, physics-driven space shooter. Execute calculated strikes against heavily automated Earth and Martian research fortresses anchored to drifting asteroids. Silence their defensive grids, secure critical resources for the Belter factions, and warp out before the destroyer fleets intercept your trajectory.

... Remember the Cant!

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Our Inertial Flight simulates Newtonian physics. This is the science of how normal objects move and interact in everyday life, based on rules discovered by Sir Isaac Newton in the 1600s. It explains how forces like pushes, pulls, and gravity dictate everything around us—from a thrown baseball to a drifting spaceship.

In a Tower Defense game, you play as the defender. In a reverse tower defense, the roles flip completely. You play as the active attacker.

From Wikipedia...

The Expanse is an American science-fiction television series that premiered on December 14, 2015 on Syfy. The series was developed by Mark Fergus and Hawk Ostby based on the series of novels written by Daniel Abraham and Ty Franck under the pseudonym James S. A. Corey. Set in a future in which humanity has colonized the Solar System...