TerminalApps contains games that run on msWindows, OS-X and Gnu/Linux, but can also be rebuilt to run on any OS capable of installing the GNAT GPL Ada compiler.
Includes an RPN calculator, Pacman and 10 kid-friendly puzzle games that use ascii characters only: seven, a2z, rush, bslid, sokoban, HoleInOne, HoleInOne+4, PanamaCanal, Nine, DirtyDozen, Pacman.
And now the more difficult puzzles have embedded AutoSolvers to help you single-step toward a solution.
See also CotermanalApps, a similar set of games with enhanced COLORS that help make objectives more obvious.
Your terminal must be least 48 chars by 14 lines.
MSWin, OS-X, GnuLinux