Hard Hitter Tennis challenges you to become the best in the world. Choose one of 14 athletes or make your own, and grow your character's stats over the course of a year. Playing well during the game will increase the mentality meter, giving your player a better chance of making tough shots. The mentality meter can also be expended to make a shot that will be difficult to hit back. Whichever player has won the most money from tournaments by the end of the year is crowned champion.
Gameplay involves hitting tennis balls against opponents in various tournament settings, with an emphasis on strategy and skill. You'll need to manage your player's stats, as well as your mental focus, to succeed. The game also features a multiplayer mode for up to four players, adding a fun competitive element to the experience.