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| genre =Rail shooter | modes = Single player | platforms = Game Boy Advance }} ''Iridion 3D'' is a quasi-3D rail shooter video game developed by Shin'en. A launch title for the Game Boy Advance portable game console, it was released in North America on May 29, 2001 and in Europe on September 21 the same year. Influenced by the Commodore 64 game ''Uridium'', the game features a single starship fighting the alien Iridion, who have attacked Earth. ''Iridion'' spans seven levels from Earth to the aliens' home planet, each with a fixed linear path that ends with a boss. ''Iridion'' began development as a shooter for the Game Boy Color; when Shin'en decided to drop development and shift their focus to the Game Boy Advance, ''Iridion'' was the first game by the developer to appear on the system. Though billed as a 3D game, Shin'en used realtime encoding and resizing to manipulate the size of 2D sprites instead of creating a true 3D environment. More room on the game cartridge was available for graphics due to the game's use of the GAX Sound Engine, which allowed real-time decoding of song data in a small file size. On release ''Iridion'' garnered generally poor reviews. The graphics and sound were generally praised; even a year after its release, critics at TechTV considered it the best-looking game on the platform. In contrast, critics derided the game's repetitive and frustrating gameplay. Despite lukewarm reception to the title upon release, ''Iridion 3D'' influenced future Shin'en shooters such as ''Iridion II'' and ''Nanostray''. ==Gameplay== The game is a simple forward-scrolling rail shooter, similar to the ''Star Fox'' series. Only the Game Boy Advance's directional pad, A, and Start buttons are used during gameplay. The ship remains locked at a set speed and cannot brake or speed up. The player encounters more than fifteen types of enemy, not including level bosses. Some are easy to destroy; others, including the fire creatures found on the Iridion home world, are indestructible and must be avoided. Other enemies prevent the player from dodging enemy fire by laying mines to block paths. Passive objects, such as garbage or asteroids, can damage or destroy the player's craft. Enemies vary in armor and weaponry—some cannot return fire but travel in waves to ram the player. Each level has the player follow a linear path through waves of enemies and culminates with a boss. In boss stages the player's craft does not move forward, but hovers in front of the boss.〔 Each boss has a single vulnerability which flashes when hit. These areas are often heavily shielded and must be hit repeatedly to remove armor. Other bosses' vulnerabilities are hidden and appear for only short periods. Most bosses have weapons that fire upon the player or reflect the player's shots. At the end of each level, players receive bonuses for defeated enemies, lives remaining, and the energy level of the player's craft. An extra life is granted if the score reaches certain thresholds. ''Iridion 3D'' features five types of weapons, with three levels of power each. Players boost weapon power by collecting powerups of the color that matches the current weapon. Collecting a different color gives the player the first level of that weapon type. If the player's ship is destroyed the power level of the weapon is reduced by one. Each weapon has advantages and disadvantages. The player starts with the red weapon, which is relatively weak but fires rapidly in a large spread. Green weapons are inaccurate but fill the screen with shots. Purple weapons spin in a counterclockwise motion slowly and are fairly strong. Yellow torpedo-like weapons are very powerful but powerups are rare and the weapon fires slowly. Blue weapons, a more powerful version of Yellow weapons, are found only on the last level. Flashing powerups restore the craft's shields. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Iridion 3D」の詳細全文を読む スポンサード リンク
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