In a futuristic militaristic society, humans engage in a brutal war against giant alien bugs. Johnny, his girlfriend Carmen, and friend Carl enlist in the military, facing intense training and battles. After Earth is attacked by the bugs, Johnny rejoins the Infantry and becomes a leader. With the help of his squad, Johnny fights in an ill-fated invasion of the bug homeworld. Eventually, he joins the Roughnecks and leads a mission to destroy a brain bug. With their victory, Johnny, Carmen, and Carl become heroes and continue the war against the bugs.

In Starship Troopers 3: Marauder (2008), the Federation is facing its biggest threat yet as they fight against insectoid aliens. With the planet at stake, a group of troopers must use their powered armor and strategic skills to overcome the enemy. However, they also face conflicts within their own ranks, including religious fanatics and mind control. As the battle rages on, the troopers must find a way to unite and save humanity from complete destruction.

In a future where Earth is at war with an alien race, a group of soldiers find themselves trapped in an outpost and must fight off a body-snatching alien parasite. As the sole survivor of the attack, a young soldier must battle the creatures and save his fellow troops before they are all taken over.