Iridion 3D is a sci-fi rail shooter for the Nintendo Game Boy Advance where players pilot a spacecraft battling through waves of alien forces. Released in 2001 as one of the GBA launch titles, it features 3D-like graphics with pre-rendered backgrounds and sprites, an achievement for the handheld's technical capabilities at the time. The gameplay includes fast-paced shooting action across various levels, each ending with challenging boss fights. Although it primarily moves on a set path (on-rails), the game allows for limited movement to dodge obstacles and enemy fire.