The most common game in the galaxy was, Surprisingly, Hide and seek, Havenworlders even had entire Leagues and sports stars based on the game.
For Havenworlders it was thrilling but safe, and allowed them to exhibit each species natural abilities in defensive evasion, as well as honed their tactics and attention to detect Predators
They were surprised to find Humans enjoyed the same game, realising that the seeker made sense to a Predatory Species, but it Terrified them just how well a human could HIDE, especially considering they had no natural aptitude for it... -- Adam in Darwin
Call it what you will: Practice Hiding, Camouflage, Hide and Giggle, Stealth Check... It's the same game. Younglings hide, siblings and older caregivers seek them out. Some add imaginary spice to the game, like safe bases and the rules behind being 'it'. Some even pretend that the floor is lava. Some merely drive their parentals to distraction.
The most surprising discovery happened on a planet named Amity, where Havenworlders and Deathworlders played one universal game, and laughed together in their shared childhoods.
Rii'tii, age five, was playing at hunting some of her Human friends, also aged five. She had thought that an elevated position in Gamma Bas' garden would help her find her play-prey, but she was mistaken. How could five Humans, none of them with natural camouflage and three wearing clothing that almost provided its own light, possibly hide themselves so thoroughly?