Slither

A snake slithers through the forty rooms of a deserted castle and never stops. Steer it with the stick; it leaves its body behind wherever it goes, so the trail grows and grows, and running into a wall or into its own trail costs a life. Each room hides as many treasures as the difficulty level, from 1 to 5, and eating them all earns the room's bonus and opens the next room. The treasures grow more valuable from room to room, from 10 points up to 400. A crash clears the trail and starts the snake again at the top left, but treasures already eaten stay eaten. You have seven lives. After room 40 comes a big bonus, extra lives and the forty rooms again at a higher difficulty. The high score is kept.

Controls: The stick steers the snake. On the title, left and right choose the difficulty, up and down choose Start or Credits, and a button starts. Either controller works.

ColecoVision version credited in the source to Claude (an AI made by Anthropic) for Amy Studio, in Amy, the language by Amy Bienvenu, 2026: a reimagined adaptation of the published rules. From Ahoy! No. 23, November 1985, page 35: original Commodore 64 program by Nat Koch. This is a modern homebrew adaptation, not a commercial Coleco release.