Gain Ground is an action game designed for Mac that offers players a unique gameplay experience across its various levels. Players can choose from a roster of twenty characters, each equipped with different weapons, to navigate through challenging environments. The primary objectives include reaching the exit with at least one character or defeating all enemies within a set time limit. The game features a mechanic where players can rescue captive characters, adding an additional layer of strategy to the gameplay. Players must also manage the survival of their characters, as losing all of them results in a game over, though they are provided with three continues to enhance their chances of success.

The game boasts a total of 40 levels in the arcade version, while the Master System and Genesis/Mega Drive versions expand this to 50 levels, ensuring a variety of challenges for players. Each level is designed to test players' strategic thinking and reflexes, making it a compelling choice for fans of the action genre. With its engaging mechanics and diverse character options, Gain Ground provides a satisfying experience for those seeking action-packed gameplay.