Half the group scatter over the playing area, they are then blindfolded, they then place a stone in between their feet. The other half of the group, the stalkers then must move around and attempt to get the stones from the blindfolded players. When a blindfolded player thinks there is a stalker near them, they point to the sound, if they are right, they swap places. Once all the stones are collected, the game is over and the winner is the player with the most stones.
Source: From the original site.