Metal Slug 3 brings the iconic NEOGEO experience to iPhone users, offering a thrilling blend of arcade action and strategic gameplay. This full version features both 'Arcade Mode' and 'Mission Mode', allowing players to select specific stages for practice or challenge. The game retains its classic charm while introducing new elements such as colorful Slug vehicles like Slug Mariners and Drill Slugs, enhancing the combat experience.

The game also includes a branching map system, ensuring varied gameplay with multiple routes to explore. Cooperative play is supported through Wi-Fi, enabling players to tackle stages together. Additionally, integration with Game Center allows users to track achievements and compete for high scores, adding a competitive edge to the fun. Metal Slug 3 successfully captures the essence of the original while adapting it for mobile play.