The players must climb the stages of human development from Pliopithecus to Homo Pfifficus. The development is represented by a 12-field-scale.

Every turn the players decide to take 1 to 9 chips in their hands.
A playing card with a special condition decides which player may move or have to stay or go back after revealing their hands. This card was displayed at the beginn of the turn.

The game ends when one or more players reached the 12th field Homo Pfifficus. These players are the winners.

This game was published in Spielbox issue 6/1992.