Zanac (ザナック) is an arcade-style shoot 'em up video game designed by Compile and published in Japan by Pony Canyon and in North America by FCI. Players fly a lone starfighter, dubbed the AFX-6502 Zanac, through twelve levels; their goal is to destroy the System—a part-organic, part-mechanical entity bent on destroying Mankind.

The game is known for its intense and fast-paced gameplay, level of difficulty, and music which seems to match the pace of the game. It has been praised for its unique adaptive artificial intelligence, in which the game automatically adjusts the difficulty level according to the player's skill level, rate of fire and the ship's current defensive status/capability.