HardBall! is the first in a series of popular baseball computer and video games published by Accolade. It was released for a variety of platforms between 1985 and 1991.

Play is controlled with a joystick or arrow keys and an action button. One of the four cardinal directions is used to choose the pitch, and again to aim it towards low, high, inside (towards batter), or outside (away from batter). The same directions are used to aim the swing when batting. When fielding after a hit, the defensive player closest to the ball will flash to show it is the one currently under control. The four directions are then used to throw to one of the four bases.

There are also managerial options available. The player has a selection of pitchers to choose from. Each team member has his own statistics that affect his performance, and can be rearranged as desired. Prior to HardBall!s release, there were managerial baseball games available, such as Micro League Baseball but HardBall! was the first to integrate that aspect with the arcade control of the game action itself.

In later releases in the series, announcer Al Michaels would provide commentary.

HardBall 5 is notable in its features which have since become standard in modern baseball video games:

• Complete roster modifications, including sending players to the minors, free agency, and trading.
• Play-by-play by Al Michaels
• A complete league of "historic teams", divided into "Legends" and "Immortals". This league acts as a substitute for MLB and can have a regular season, playoffs, and World Series. There is even an All Star Game between the Legends and Immortals.

HardBall 5, while having every team and player as of that season, does not feature team names or logos. Fictional logos are used in place of the regular team logos (e.g. the Atlanta Braves logo has been replaced with a logo depicting a raptor head in front of a baseball).