It is a PlayStation port of the original Shienryu. It adds following:Pocket Mode: Presented in PocketStation graphics and effects (under the name JIENRYU), enemies appear as blocky heart-shaped craft and bullets are tiny gray blocks, all lacking graphical detail.Comical Mode: The same game, only there is no music and the sound effects are replaced by various laugh tracks and an audience applauses the player the higher their score gets.Stingy Mode: The same game, only the player has only one life, no continues and there are only two levels. Oddly enough, the original soundtrack is used in this mode only.No Mercy Mode: The same game, only extremely difficult.Slow Mode: The same game, only darker shading, an atmospheric/techno beat soundtrack and all sound effects are replaced by haunted-house type sounds. It's interesting to note that all enemies and the player's ship scream once destroyed. Despite the greatly slowed movements of all of the sprites onscreen, the game vastly increases the number of bullets put out by the enemy and this mode is, surprisingly, the most difficult setting in the game.Ancient Mode: The same game, only presented in a yellowed-with-age monochrome screen with cracks and lines in the screen as well as weakened sound effects and music to create an antiquated feel.Arcade mode now called Gekioh Mode.