| Zanac was published in Japan for the Famicom Disk System by Pony, copyright 1986. Its manual's first printing is dated November 1986; no source read gives the disk's release date. | back cover (PDF p. 24), creditsback cover (PDF p. 24), credits | Manual |
| The Famicom Disk System manual credits planning to A.I. and the computer design to Compile, and names Pony Inc. as producer and seller. | back cover (PDF p. 24), creditsback cover (PDF p. 24), creditsback cover (PDF p. 24), credits | Manual |
| Zanac has eight special weapons, numbered from FIRE 0, which it starts with. Catching one of the numbered power chips changes the weapon, and only one works at a time. | p. 8 (PDF p. 10), 特殊兵器p. 8 (PDF p. 10), 特殊兵器 | Manual |
| Both manuals describe ALC, an automatic difficulty control they credit to AI: the strength and number of enemies change with the player's attack and skill, and where enemies appear differs from game to game. Their examples: a high rate of fire raises the difficulty; each aerial object that appears raises the enemy's strength, by small steps in the Japanese manual; destroying a fortress lowers it, and missing one raises it. | p. 10 (PDF p. 12), AI機能についてp. 10 (PDF p. 12), AI機能についてp. 10 (PDF p. 12), AI機能についてp. 10 (PDF p. 12), AI機能についてp. 10 (PDF p. 12), AI機能について | Manual |
| Both manuals present ALC as Zanac's own: the US manual calls it unique to Zanac and says each game is like a new one, and the Japanese manual calls it a feature earlier shooting games didn't have, giving Zanac an endless story. | p. 10 (PDF p. 12), AI機能についてp. 10 (PDF p. 12), AI機能について | Manual |