Metal Gear Acid is a strategy game set in a fictional universe. The story follows Liquid Snake, a character from the Metal Gear series, as he attempts to uncover the truth about his past and the events leading up to a catastrophic future.
The gameplay involves turn-based strategy, where players control Liquid's movements and actions on a grid-based map. Players must use resources and equipment to overcome obstacles and defeat enemies, all while managing Liquid's mental state and avoiding attacks from rival forces.