3-K Trivia is a trivia game for up to six players. Each question round begins with a slot machine which randomly chooses three of the question categories (science, history, geography, nature, sports, show business and two mixed topics). Then the player (each participant is quizzed separately) chooses the category (provided that different ones appeared) and has to answer a trivia question by typing in the answer.
Answering correctly awards a certain amount of points and the goal is to collect more than the other players. The specific amount is influenced by a number of factors, most importantly the spinning at the beginning of the round: when a category appears more than once, it is worth more points. There are also Joker cards which increase the stake. Points are deducted for using the help function (revealing a letter) or small differences (e.g. due to a typo) to the correct answer. When the result is tied after the last question was asked, the game continues one question at a time until one player wins.
Options include setting the number of questions each player is asked (up to 25) and a 15 second time limit for answering. The game allows to add more questions.