Dot Heroes III - Keep the Castle is a free Android game developed by Studio EZ in the role-playing subcategory. The game is about defending a peaceful town against monsters that have invaded it. The player's goal is to stop the monsters from entering the town by clearing each stage and killing all the monsters. The game features an action game mode that uses up-down slide controls to attack waves of monsters.

Dot Heroes III - Keep the Castle has an infinite number of stages, with more powerful monsters appearing at later stages. Bosses appear every 10 stages. If a stage is too difficult, the game offers a practice mode where weaker enemies appear to level up and try again. The game also features a world map where the player can experience various stages and boost their ranking.

To defend the town, players can raise their hero and upgrade skills. They can also hire and place mercenaries to fight more powerful monsters. The game offers numerous mercenaries for players to choose from. In addition, players can purchase buffs to gain more Gold for a certain amount of time.

For optimal gameplay experience, the game requires a server connection. Players are advised to turn on their Wi-Fi or data communication. A Google account is required for Play Game login, and players are encouraged to use Cloud saving to protect their game data.