Take control of Earth Command Lieutenant Aileen Harding as she adventures through intense sci-fi battles against hordes of unique aliens and huge bosses. With an array of special abilities and combat powers youll draw on quick reflexes and skill plus a wide choice of weapons armor and items to defeat increasingly formidable opponents. Completely customizable character functionality expands in-game strategy options inspired by the original SEGA arcade shooter. Venture cooperatively through the expansive sci-fi world with up to four friends relying on your robot assistant to fight alongside you and exchange or improve your weapons and armor. Intense and action-packed with 110 monsters 15 sub-bosses and five main bosses to fight using 80 weapons and hundreds of armor types and bonus items. Extremely high-quality sci-fi action-RPG gameplay made specifically for the the PSP (PlayStation Portable) system. In-depth gameplay with 15 intricate levels and multiple side quests 20 hours of action-packed adventure.. . . nbsp