1. Start the game: Once you have the game, start it by selecting the game icon on your device.

2. Select the game mode: Depending on the game, you may be able to choose between different game modes, such as story mode or multiplayer mode.

3. Play the game: Use the control buttons to move Sonic the Hedgehog, jump, spin, and use other abilities to navigate through the levels, avoid obstacles, and defeat enemies.

4. Beat the game: Each Sonic the Hedgehog game has different levels and challenges. The goal is to complete all the levels, defeat the final boss, and save the day.