"Published by Enix, Door Door is a captivating blend of puzzle and platform gameplay elements, setting a distinct mark in the history of retro gaming. Door Door was initially released in 1983 for the NEC PC-8801, with subsequent conversions for other Japanese computers. Its success led to an expanded edition and a Famicom port in 1985, and even a mobile release in 2004. This game has never been released outside of Japan, despite its popularity and recognition amongst the best Famicom games by Famitsu, a leading Japanese gaming magazine. Door Door introduces players to Chun, a small spherical creature donning a baseball cap. Chun is pursued by four game AI aliens, each following a unique deterministic algorithm path. The player's objective is to trap these aliens behind sliding doors positioned throughout each level. The gameplay requires strategy, anticipation, and dexterity, offering an enthralling retro gaming experience.