Rebelstar: Tactical Command is a TRPG for the Game Boy Advance (GBA), developed by Atari, set in the near future of an alternate reality. In this reality aliens, known as the Arelians, have added Earth to their empire. Their dominion is secured by the brutal Zorn, who police the Earth itself.
When people are born they get a tracking chip implanted in their heads, allowing the Arelians to find them come their 30th birthday, when they are whisked away for unknown reasons.
Needless to say people got upset by that and have taken to resisting the Arelian overseers. One of those people is Jorel, the player's main representative in the game, though he is assisted by Zak, a heavy weapons expert, and Ruby, a sniper.