Complex sentence: The game's first port was on the PC Engine in 1992 and was published by Hudson Soft and released only in Japan; it featured an alternate English translation, more colorful and detailed graphics, and difficulty and gameplay tweaks.
Split into simpler sentences: The game's first port was on the PC Engine in 1992 and was only released in Japan. The PC Engine version featured an alternate English translation, more colorful and detailed graphics, and difficulty and gameplay tweaks.