Strange things are happening: skeletons started to raise from their graves at the graveyard. Now they are walking around and you, as a competent gravedigger, must return them to their tombs and ensure they stay there. 'Saco de Ossos (bone sack) is a game based on Tic-Tac-Toe, where the objective of each player is to be the first to align 3 skulls of their color, OR to enclose a tomb with 4 crosses of their own color. With a single copy of the game, you play a 2 player game. With a second bag of other color, up to 4 players can play the game. —user summary