|Video game debut||Yu-Gi-Oh! World Championship 2008|
UFOroid can randomly appear in the second half of the Darkness Duel World, attempting to make contact with the player. The player will be given four symbols to choose from («, ¢, *, %) in order to try to communicate with it. UFOroid can either be dejected, happy, or thrilled. Positive reactions earn the player a "Roid" card, with the card being better the happier UFOroid is.
The results are set at the time UFOroid is interacted with, and all choices give the same result for both reactions and rewards.
UFOroid does not duel under any circumstances.
If UFOroid is stated to be happy, it will give the player 1 copy of one of these cards.
If UFOroid is stated to be thrilled, it will give the player 1 copy of one of these cards.