Make it to homebase before the "police" tags you or else you go to jail.
Begin by choosing a homebase and a jail. Both need to be areas or places you can step on or touch. Choose someone to be the policeman. The policeman counts slowly to 20 and then tries to find the others who have hidden. Then those who are hiding try to make it home without getting tagged. When someone is tagged, they go to jail (usually the porch). Those who are not tagged, try to step on or touch the jail and this will cause a jailbreak setting everyone in the jail free. When all the players have been sent to jail, the first one in is now the person who is the next policeman.