Metal Slug X offers various weapons like the Heavy Machine Gun, Shotgun, and Rocket Launcher. Each weapon has unique features and advantages, which can significantly impact gameplay. Players should experiment to find the best fit for their playstyle.

Vehicles such as the Metal Slug tank provide additional firepower and protection. Players can enter these vehicles by walking into them. Be cautious, as vehicles can be destroyed, and you'll need to exit carefully when necessary.

To successfully defeat bosses, focus on learning their attack patterns. Staying mobile and utilizing your weapons efficiently is crucial. Use bombs strategically and avoid their attacks, especially during their most dangerous phases.

Unlocking new characters involves completing specific in-game challenges and objectives. Players must explore levels thoroughly and often collect items or achieve certain score thresholds. Take note of any special missions that hint at character unlocks for more guidance.

For advanced gameplay, practice combo techniques like jumping while shooting and using melee attacks effectively. Keep an eye on enemy spawn points and use the environment to your advantage. Additionally, learn to manage your resources, like ammo and health items.