
These units are highly durable and usually are saved as trump cards. Late Game units have an AP cost more than 500 or even up to 1000.

Early Game Units: Units with niche and stronger capabilities in the early phases of the game.Many openers provide opportunity for the player to deploy their other units. Openers/Opening Units: As it name implies, these units are usually the ones being deployed first by the player.There are four unofficial categories for units, which can be determined easily by their AP cost.

It is recommended to sort them based on AP cost. A player can place at least one unit in their Deck with a maximum of 10 units.

Each units in Metal Slug Attack portrays a wide variety of roles: Offense, Defense, and Support to make up for the player's lineup.
