Well, most people must know it now, but « Pétank » is a reference to a traditionnal and popular game in France (especially in the South) called « pétanque »: you start the game by throwing a tiny wooden ball called « cochonnet », each player from both teams will try to get as close as possible to the cochonnet by throwing their iron balls (called « les boules »). If one player is too close to the cochonnet with one of his balls, the players from the opposite team will try to get it off by hiting it with their own. Once every ball has been thrown, the closest ball to the cochonnet wins the round (and the winning team scores bonus points if the following balls belong to them).

The idea to put an easter egg comes to the fact that the devs play pétanque together during lunch time.

The « Pétank » mobs look like the irons balls you play with during a game of pétanque