SD Gundam G Generation Cross Rays game, mecha, unlockable units, strategy, tactical RPG, Gundam series, diverse roster, customization, upgrade system, pilot skills, space battles, interstellar war, detailed cockpits, futuristic weapons, laser swords, mobile suits, full roster, completion bonus, secret codes, game achievements, tactical grid map, isometric view, dynamic lighting, special effects, high-resolution textures, metallic surfaces, reflective armor, particle beams, explosion animations, collectible items, fan service, anime style, science fiction theme.