Defender for the Nintendo Game Boy Advance (GBA) is a modernized version of the classic 1980s arcade game, blending the genre of side-scrolling shooter with strategy elements. Players pilot a spacecraft, tasked with defending human colonists from waves of alien invaders across various planetary landscapes. The game features fast-paced aerial combat, where players must shoot down enemies, rescue civilians, and strategically deploy special weapons. With its retro roots and updated graphics, Defender offers a nostalgic yet engaging experience for fans of arcade-style action games.