1. A game device comprising: a lottery unit configured to decide stop positions of spinning slot reels of a first reel group displayed on a display; a decision unit configured to select a type of battle action among plural types of battle action, with reference to the stop positions of the spinning slot reels of the first reel group decided by the lottery unit, and the decision unit being configured to decide the selected type of battle action as a battle action by a player character, each type of battle action having an attribution associated with a set of symbols of the slot reels of the first reel group at the stop positions, the plural types of battle action including a first type of battle action having a first attribution to attack an enemy character and a second type of battle action having a second attribution different from the first attribution; and a determination unit configured to decrease hit points of the enemy character in response to battle action by the player character, and to decrease hit points of the player character in response to battle action by the enemy character, the determination unit being configured to determine a winner based on respective remaining amounts of the hit points of the player character and the enemy character.