A game apparatus includes at least one processor, and a memory that is coupled to the at least one processor and configured to store therein instructions executed by the at least one processor. In the game apparatus, based on the instructions, the at least one processor is configured to select, by lottery, at least one lottery element from among lottery elements including a specific lottery element in an event, award a player a reward when the specific lottery element is selected, and change, based on a result of the lottery in the event, a probability of selecting the specific lottery element in a next event.