You only need one key to play, the enter key. Players take turns pressing it on their turn. Optionally you can rewrite hitenter() so that it automatically advances and you?ll have a game that truly plays itself.

After playing this game don?t be surprised if you look at games you played as a child like chutes and ladders differently.

Playoff Soccer is by R. Alan Monroe.

In this program you are challenged to count a number of seconds as accurately as possible. If you are within 1 tenth of a second you win.

If you?re not sure how the clock function in C works, here a good example for you.

Reflex is written by Joe Larson.

Sine Wave is by R. Alan Monroe inspired by a BASIC program of the same name by David H. Ahl as found it 101 BASIC Games ? 1978.

On a personal note, I have a long history with this game. I first seem to recall playing it on the Commodore 64, although if I remember it was actually a written for the PET computer. I remade it on the C64 in BASIC using a sprite pointer that you controlled with the joystick and snazzy graphics created with the C64′s tile set and color control. This was also the first version that had multiple goals, where as the original only asked you to make an “O” to win. Imagine my disappointment when years later I went back and found it painfully slow. I made a new version in assembly years later, sans the multiple goals, and snazzy graphics.

For an extra challenge, look for the line in the function puzzle() that reads:
bd = rand () % 0x01FE + 1;
…and change it to…
bd = rand () % 0x01FE + 1; goal[lv] = rand () % 0x01FE + 1;
…and every time you play you’ll have completely random goals.

Buttons was written by Joseph Larson

The optimal solution, like with high/low games, is a divide and conquer strategy. However with 2 numbers you should discover quickly that halves are not always the best solution. Played optimally it shouldn’t take more than 5 guesses. The game as it’s written gives you eight.

Trap is written by Joseph Larson.

Like other guessing games, after each guess in hurkle you will be given hints that you can use to refine your next guess. The twist in hurkle is that you need to keep track of 3 dimensions at once. Since this program doesn’t have much in the way of graphical output it requires a keen sense of visualization. Like other guessing games the best strategy is divide to win.

Hurkle was written by Joseph Larson inspired by a BASIC game by Doug Albrecht as found in ‘BASIC Computer Games’ edited by David H. Ahl ? 1978.

Letter Guess is inspired by the BASIC Game ‘Letter’ written by Bob Albrecht as found in ‘BASIC Computer Games’ edited by David H Ahl ? 1978.

Bagels is written by Joseph Larson based on a BASIC game by D. Resek and P. Rowe as found in ‘BASIC Computer Games’ edited by David H. Ahl.

Ruler is written by Stephen Parkes based on a BASIC game for the ZX81 written by A. Greenhalgh of Darwen, Lanacshire and published in Sinclair User March 1983.

Control is mapped so that you can use the number pad. If you find all but two blocks are in place you can swap them by pressing 0 (zero) answering that you do not want to exit the game, and choosing which two to swap, however this move is available to you only once, so it’s often the last move.

Rotate is written by Joseph Larson, inspired by a BASIC program of the same name by David H. Ahl as found in ‘More BASIC Programs’ ? 1978.