Jack Curtis and Troy Alexander, new recruits of the LightStormer Corps, receive psionic implants upon completing their training missions. Through his training performance, Jack has placed comparably to his elder brother and commanding officer Blake Curtis – and their late father, a revered LightStormer who was a personal friend of United Nations President Krieger. Blake gets an emergency call: a crew of Cryo-Pirates have commandeered a space station in Jupiter's orbit. At Blake's orders, Jack goes to the station and activates the self-destruct sequence. A mysterious girl named Eve monitors Jack in action. President Krieger has taken notice of Jack and ordered an endorphin boost for him. They talk briefly with Troy, who is being sent on a "special assignment" by President Krieger. Another emergency call comes in, this time from Triton, one of Neptune's moons, where a colony of scientists was established ten years ago to terraform the moon. The colony has been overrun by hostile aliens, so Jack is dispatched to eradicate them. Returning from Triton, Jack learns that Troy has been
killed in action on Mars while attempting to locate a mysterious psionic orb. Blake hopes Jack will succeed where Troy failed. Jack comes through, despite having little more than his psionics to fight with. Jack is unhappy that he is not allowed some R&R to clear his head given the orb's vast enhancement of his psionic abilities. Blake reminds him that President Krieger has final say on all such decisions. Jack is sent to Antarctica to wipe out the test subjects recovered from the Triton incident that got loose and stole a batch of Cyclone weapons. Jack's objective is to retrieve their genetic databank. After this, Jack is sent to Jupiter's moon
Io, retaking the colony from Jovian gangsters who commandeered a sulfate mine and production plant. President Krieger personally congratulates Jack upon his triumphant return. He then dispatches Jack to New Atlantis, to join Blake for some R&R. Blake calls in from New Atlantis. The colony has been overrun with hostile mechs and a reactor coolant leak is about to destroy the whole place. Jack rushes over, outfights the mechs and kicks in the backup coolant to find it disabled. New Atlantis explodes, killing Blake and thousands of innocents. Jack alone survives because Eve beamed him out. She explains that President Krieger used Jack to locate and bring back the psionic orb and the Triton alien soldiers' genetic databank, because this will give him all but unlimited psionic power and a private military company staffed with physically superior extraterrestrial soldiers. Eve is the head of the rebel faction the Alliance Of Democracy, which is attempting to overthrow Krieger's presidency and replace it with their own regime. She convinces Jack of their cause. Jack takes on Krieger's private army as he infiltrates the president's headquarters, but he is captured by a teleporter in his office and restrained to a chair. Krieger is unnerved by Jack's flippant defiance and reveals Jack's father got wise to Krieger's pursuit of the orb and threatened to expose his then commanding officer, prompting Krieger to send a group of "terrorists" to kill Jack's father. Krieger uses his Extractor torture device to try to retrieve the Terrablast implant from Jack's skull while putting him under an induced hallucinatory nightmare to erode his will. Jack resists and battles his way free of the hallucinations. He then storms through Krieger's secret base and the president's forces, at last taking out Krieger. There are two different endings depending on the difficulty level. In easy mode, Eve becomes President of the U.N., and Jack head of the LightStormer Corps. In hard mode, Jack himself becomes the U.N.'s new president. ==Development==