Knock 31

The card game known as 31, Scat or Blitz, played against three computer opponents. Everyone starts with the same number of points, from 5 to 25. Each player holds three cards; on your turn you take the top discard or the top card of the deck, then discard one. A hand counts the cards of its best suit, ace 11, picture cards and tens 10 and the rest their number, up to 31. When you think your hand is good enough you knock: everyone else has one more turn, then the hands are shown. If anyone matches the knocker, the knocker loses two points; otherwise every other player loses one, or two when the knock came in the first round or with 31. A player with no points is out, and the last one left wins.

Controls: Push the joystick left and right to choose the deck or the discard, then the card to throw, and press either button to confirm. When asked whether to knock, choose NO or YES with the stick.

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 COMPUTE!'s Gazette, May 1989: original Commodore 64 program (no author named in the issue). This is a modern homebrew adaptation, not a commercial Coleco release.