Sigma Star Saga(2005)

When a double-agent's allegiance begins to waver, the galaxy finds itself in a precarious position. Humanity is struggling to survive against the Krill onslaught. Ian Recker, a decorated pilot, goes undercover to investigate the Krill's secrets, but finds himself trapped in a moral dilemma. The first RPG on Game Boy Advance to combine a deep storyline and well-developed characters with a space-shooter battle engine. Customizable weapons including over 15,000 Gun Data combinations. Branching storyline with four ending and 20+ hours of gameplay.