fighter will sustain damage. This combat system was created with accessibility in mind. This "bump attack" system has become one of the series' defining features. Falcom staff have compared this style of gameplay to the enjoyment of popping air bubble sheets, in the sense that it took the tedious task of level-grinding and turned it into something similar to a high-score-based arcade game. According to GamesTM and John Szczepaniak of Retro Gamer and The Escapist, "repetition of the act was pleasurable as you developed a psychological rhythm and, even in the event of backtracking, progress was always swift since the player never needed to stop moving". Another feature that has been used in nearly every Ys title since the original is the recharging health mechanism, which had previously been used in the Hydlide series. Recharging health has since become a common mechanism used in many video games today. Version differences Aside from graphical differences, the game layout remains essentially the same across the many ports of Ys; there are some versions where the details were changed. The Sega Master System version, for example, saw some of the game's dungeon areas flipped horizontally (including some other minor differences). The most distinctive of the early ports was the Famicom edition, which was published by Victor Musical Industries. This version was a vast departure from the original, featuring entirely new layouts for the towns, field, and dungeons, replacement of a number of the original musical tracks, and a new final battle sequence. The version developed for the MSX2 contained a handful of new musical tracks which replaced part of the original game's soundtrack. Some of these tracks, along with a number of unused tracks first composed for the original, were later incorporated into the soundtrack of Ys Eternal and Ys Complete. The versions developed for the TurboGrafx-CD, released as Ys I & II in 1989, included additional cutscenes, such as an opening detailing Adol's arrival in the town of Minea. The Microsoft Windows-based remakes, Ys Eternal and Ys Complete, expand further on this and many other story elements, through both cutscenes and additional gameplay. The Sharp X68000 enhanced remake released in 1991 was notable for its early use of 3D pre-rendering for the boss sprites, but this ended up creating what is considered "a bizarre contrast" with the game's mostly 2D graphics. Music Composed by Yuzo Koshiro along with Mieko Ishikawa, the soundtrack