During a game, teams can adjust their tactics mid-game by analyzing the opponent's strategies and making necessary changes to counter them. This can involve making substitutions, changing formations, instructing players to focus on specific areas of the field, or implementing set plays. Coaches and team captains often play a crucial role in observing the game, identifying weaknesses or opportunities, and communicating the necessary adjustments to the team during breaks in play. Flexibility, adaptability, and quick decision-making are key factors in successfully adjusting tactics mid-game.