We know that Sburb was a game sold by multinational companies in both Alpha and Beta Earth universes, but what about Sgrub? What's the origin of the codes found by Aradia in the ruins? Billions of years prior to that, what's the origin of the original Sgrub, found by Meenah during her escape to the moon?

Aradia found a Frog Temple in a ruin and sent the code in the ruins to Sollux who adapted it into a computer game. Meenah found the game on her pink moon and had her friends start playing.