Abstract: A video game that can be played in parallel with the progress of an actual sports game is provided, in which RAM 10 stores a plurality of factors representing the situation of a game of, for example, professional baseball, such as team names, scores, counts (S, B, O), win-loss records data regarding specific pitchers and specific batters, a mouse 14 is operated by a video game player to input a prediction about a type and a course of the next pitch supposed to be thrown by a pitcher in a game of baseball actually being played into a determining apparatus 16, a prediction preparing apparatus 12 reads out data from the RAM 10 and predicts a type and a course of the same next pitch to input the prediction to the determining means 16, and the determining means 16 determines for the video game player's prediction and the data-based prediction whether the predictions are right or wrong by comparing them with the results.