is a 1990 vertically scrolling shooter arcade video game developed by Seibu Kaihatsu and published by Tecmo in Japan. The game's story takes place in the year 2090, when an alien species known as the Crystals invaded Earth. Players assume the roles of the Vanquish Crystal Defense pilot duo, taking control of two state of the art Fighting Thunders aircraft to defeat the Crystals and save the Earth. The game was conceived after Dynamite Duke, Seibu Kaihatsu's prior title, failed to sell as well as expected. During development, the game was designed as a vertically scrolling shooter due to the popularity of the genre at the time. Cheaper arcade hardware had to be used due to financial constraints caused by Dynamite Duke'''s poor sales. (Translation by Shmuplations. ). Although Seibu doubted Raiden's success, it managed to sell 17,000 arcade units worldwide, helping to recuperate the company's investments through word-of-mouth. The title became a critical success, with its most lauded features being the graphics, music, gameplay and co-operative play. Due to the success of Raiden, several sequels and related games were made. Raiden was ported to home computers and various home video game consoles in the early to mid 1990s. The game was released as part of several compilations and through download services such as PlayStation Network. The ports received mixed to positive reception. Gameplay Raiden is a vertically scrolling shoot 'em up game consisting of eight stages of increasing difficulty. In each stage, the player maneuvers the Fighting Thunder craft, engaging various enemies and avoiding their attacks. In cooperative play, both players can generate special projectiles that damage enemies by shooting the other player craft. After completing the eighth and final stage, the player returns to the first stage with the difficulty increased. Collectible items include bombs, which cancel out enemy fire and deal damage over a wide area; weapon power-ups; and score-increasing medals. There are two bonus collectible items: the Miclus (a boss in Seibu Kaihatsu's 1985 title Wiz) and a fairy that releases power-up items when the player dies. When the player dies, the fighter's shrapnel become projectiles that damage enemies. If all lives are lost during a gameplay session, the game is over unless players insert more credits into the arcade machine to continue playing. Upon continuing, the player will start at the last checkpoint reached. Plot The story of Raiden takes place in the year 2090,