The Switch version of Metal Slug Attack Reloaded does not have microtransactions. This is a change from the original mobile version, which did include microtransactions. The removal of microtransactions in the Switch version aims to provide a better gaming experience for players.
The main objective of Marco Rossi's team in Metal Slug Attack Reloaded is to stop the Rebel Army, led by General Donald Morden, from taking over the world. Players lead the Peregrine Falcon Squad and engage in tower defense-style gameplay, sending waves of units to destroy the enemy base.
In the game's combat system, AP (Action Points) are used to purchase and deploy units during battles. More powerful units cost more AP, and players can upgrade their base to regenerate AP more quickly, allowing them to buy stronger units faster. This adds a strategic element to the gameplay as players must manage their AP wisely to defeat the enemy base.