The New Clea Casino is an educational game that teaches about half-life. General Manager Mr. A. Tom Mick has discovered 100,000 radioactive playing chips at the casino table. The player has a $1,000 at his or her disposal and must determine the amount of chips at various time intervals knowing the half-life of the radioactive material.
Schach is a chess program initially written in FORTRAN (version 1), later ported to ALGOL (version 2) and x86 assembly for DOS (version 3). Version 1 played in the American computer chess tournaments (1970, 1971 and 1972). Version 2 played in six World Computer Chess Championships between 1980 and 1986. Version 3 played multiple local European championships and international computer chess and microcomputer chess tournaments between 1991 and 1997.
Qubic is a three dimensional Tic Tac Toe game written in BASIC. It was later collected in the book BASIC Computer Games. The game plays like Tic Tac Toe except instead of a 3×3 board there’s a 4x4x4 board and the player and computer must try to get four in a row. The player decides if he goes first or second.