becoming the "Pulse Laser" and "Force Field" becoming the "Shield". Narration is added to the beginning of each stage, detailing the area of the alien's body which the player is currently inhabiting such as "Enter stomach muscle zone" or "Bio-mechanical brain attack". Konami later released an enhanced version of Salamander in Japan in 1987 bearing the American title of Life Force which further fleshes out the organic motif. All of the backgrounds and mechanical enemies are completely redrawn and given organic appearances. The power-up system was also modified, with the Japanese Life Force using the same power-up gauge as the original Gradius. Some music tracks have been completely changed for this release and the power-up gauge is arranged differently for both players. Ports Amstrad CPC, Commodore 64, and ZX Spectrum Ocean Software on their Imagine label, released licensed versions of Salamander for computer systems by Spectrum, Commodore and Amstrad in 1988. The Spectrum and Amstrad versions were generally criticized, but the Commodore 64 version was highly praised by the critics of the day, particularly Zzap!64. Though missing two of the six stages, the simultaneous two player mode and gameplay being much easier than its arcade counterpart, the Commodore port is generally considered to be one of the best arcade conversions on this system. Family Computer/Nintendo Entertainment System Salamander was ported to the Family Computer in Japan in 1987. Instead of being a direct port of Salamander, elements were taken from the original Salamander and the Japanese Life Force re-release, and some elements, such as levels and bosses, were removed to make way for new content. Most of the background graphics and enemy sprites from Salamander are used in favor of those used in Life Force, though the Gradius-style power bar is used in place of the original instant pick-up system. The same year, North America received a port as well for the Nintendo Entertainment System. The NES version is practically identical to its Famicom equivalent, other than not having the multiple endings, having two option power ups instead of three, and being titled Life Force. The North America version was later re-released for the Virtual Console on February 16, 2009 for the Wii, on January 23, 2014 for the Nintendo 3DS and August 21, 2014 for the Wii U. The European version is titled Life Force: Salamander on its cover and was released on November 22, 1989. The NES version