Llamatron is a multi-directional shooter where the objective is to stop an invasion of Earth that is being launched by alien mutants known as the Zyaxxians. The player's character—the eponymous Llamatron—is placed in the center of a black screen, with enemies—labelled in-game as "Grunts"—scattered across the playing area. Once the level begins, the enemies move towards the player and, if any of the enemies come into contact with the llama, the player loses a life.
The player's goal is to destroy every enemy on the screen with the llama's laser, which fires automatically in the direction that the llama is facing
The player gains points by destroying enemies and collecting llamas, sheep, goats, and camels—known collectively as "Beasties"—that are placed on the screen at the start of the level. Upon destroying all of the enemies on a screen, the player advances to the next level.
