The server according to an embodiment provides interactive games that use characters moving on a route and require more strategies. The server is configured to execute an interactive-game program including a screen display module for display a game screen, a first placement module for placing the characters selected by the players on the routes before a predetermined starting condition is satisfied, a movement module for moving the characters toward the bases of the opponent after the predetermined starting condition is satisfied, a second placement module for placing the characters selected by the players on the routes after a predetermined starting condition is satisfied, a battle process module for performing a battle process when the distance between the characters falls within a predetermined range, an occupation process module for performing an occupation process, and a determination module for determining a result of the interactive game.