ZANAC×ZANAC – A definitive arcade-style top-down scrolling sci-fi game, ZANACxZANAC packages the classic 8-bit ship-based shooter ZANAC with its sequel, ZANAC NEO. The Auto Level Control system automatically adjusts the game difficulty to match player skill, so 8- and 16-bit sci-fi shooter veterans and newbies alike can enjoy the chaos and fun of blasting everything in space to bits with a variety of weapons.
Source: The Publisher Website.
Zanac X Zanac is compilation of Zanac games: 3 versions of the original 8bit game and Zanac Neo. Zanac Neo is a updated version of Zanac with more story, new cut scenes, new weapons, changed levels, all new cooperative play, and update 32 sound and graphics. Zanac Neo was unrealized until this Zanac x Zanac.