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PlayStation 2 PlayStation Portable |genre=Scrolling shooter |modes=Single-player, multiplayer |cabinet=Upright |arcade system=Konami Hornet |display=Raster, 512 x 384, horizontal orientation }} is the fourth arcade installment in a series of scrolling shooter video games developed by Konami Computer Entertainment Tokyo. It was preceded by ''Gradius III'', released in 1989, although spinoffs had been released prior to it such as ''Gradius Gaiden''. This title brings a considerable graphical upgrade, particularly with the use of colored lighting. In addition, there have been several additions and removals to the vaulted weapons system; specifically, the edit mode has been removed and an online ranking system was added. ==Gameplay== The core gameplay of ''Gradius IV'' remains relatively unchanged. However, several changes were made on the weapons system in the transition from ''Gradius III''. First of all, the edit mode has been completely eliminated, as are the "Snake Option" (s.option), the "Reduce" shield type, and the seventh powerup category. The seventh powerup category was the one that was labeled "!" and would produce detrimental results, such as reducing the speed or eliminating the weapons of the ship. In this game there are a total of six configurations, the first four of which are migrated from ''Gradius II: Gofer's Ambition''. The two new configurations are as follows: Configuration 5: The missile mode is a vertical mine that is released above and below the ship. After a short delay, the mines explode, yielding a large explosion. The double mode is the standard 45-degree angle split. The laser mode is a thin armor piercing round that can penetrate multiple enemies. Configuration 6: The missile mode is the flying torpedo, which produces two missiles that fly forward in front of the ship. The double mode is the tailgun, seen in other configurations. The laser is the twin laser seen in ''Gradius III''. Starting a tradition that is continued in ''Gradius V'', this game introduced an online-ranking system. After a player's game was over, a password was presented. This password, which was hashed scoring information, could be uploaded to a Konami website.〔http://www.konami.co.jp/am/gra4/RANK/index.html〕 This was only available in Japan, and was discontinued on August 27 of 1999. This was similarly done for the ''Gradius III and IV'' console release. Score recording was disabled approximately a year after its arcade brethren. 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「Gradius IV」の詳細全文を読む スポンサード リンク
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