Hunting rock (Earth-2042)

Hunting rock is a simple Unggoy game where each participant kills a small or medium sized creature, such as a Scrub Grub, by throwing a rock at it, then the one who killed the creature will need to hold it on their hands and stop the loser from taking it from them. Each kill is marked based on how difficult or easy it was to kill the creature.

Source

 * https://www.halopedia.org/Hunting_rock