A server device stores a plurality of first messages and a plurality of second messages to be made available to a player as a result of a use condition being satisfied. The server device generates, if the use condition is not satisfied, a first message list including only the first fixed messages and generates, if the use condition is satisfied, a second message list including at least one of the second fixed messages. In response to a request from a player terminal, the server device generates, before the use condition is satisfied, data of a game screen including a selection operation area allowing a player to select a message from the first message list and generates, after the use condition is satisfied, data of a game screen including a selection operation area allowing a player to select a message from the second message list.