Join Five (also known as Morpion Solitaire or Cross 'n' Lines) is a pen-and-paper game for one players, played on a plus-shaped grid of dots. The origins of the game are probably in northern Europe. References to the game first appeared in French publications in the 1970s.

There are 2 modes of the game, referred to initial board:
- more popular "outlined"
- and "filled"

After beating someone's record you will be able to publish yours. Worldwide's record is over 170 points. Enjoy!