Battle in the City is the third mission of Metal Slug: 1st Mission.
The Hero arrives at a city overrun by Rebel troops and vehicles. The buildings in the city can be entered, either having an enclosed room or a hallway with multiple exits. In some buildings, there is a sewer system underneath whose pits all lead to a hidden route. The sewers can also be accessed by throwing a grenade on the two manholes located outside.
Traversing through the city directs to a battle with the Rebel Train.
- Complete Mission 2 (Slicing Through the Jungle)
- Complete Mission 8 (Forced Escape)
- Mission Complete: Proceed to Mission 5 (Pursuit of the Transport Train)
- Hidden Path: Proceed to Mission 4 (Underground Battle Pass)