D-Force is a single-player action shooter game in which players pilot an Apache Helicopter, engaging in vertical scrolling combat against various enemies. In this game, the storyline is set in a sci-fi universe where players take control of a helicopter to combat enemy forces across different levels, each culminating in a midboss and a boss fight. It stands out with its unique level design that alternates between 'Shooting Mode' and 'Exploration Mode,' the latter featuring fantasy-like environments without power-ups and allowing altitude adjustments, adding strategic depth to gameplay.