Throughout the Metal Slug games the player can free prisoner of war (POW) NPCs who are captured in various ways throughout the levels. The energy burst also inflicts damage to any enemy caught in its direction,” reads the character bio on the Metal Slug fandom site. It’s because of ongoing promotions for the 30th anniversary of Metal Slug. From doing further research, we have learnt that this name has been used in many Metal Slug games, but usually titles that were released outside of the arcade. We’ve spent the majority of our time playing Metal Slug in arcades, so we don’t feel too bad missing this detail.