Alien Civilizations is a Ketran Uninet game revolving around making slight changes to a alien race to cause them to advance to some goal. It was very popular among many Ketrans, including Toomin (Ellimist). The Ketrans of Polar played something similar to this, although in their game they make bigger changes. Their game was sent out into space, attracting the attention of the Capasins. Not understanding that it was merely a game, the Capasins were horrified that the Ketrans were "messing with sentinent species." This caused them to invade and exterminate the Ketrans of Ket in an act of revenge.