METAL SLUG ANTHOLOGY

In order to "rescue" a prisoner in a level, you must free them from their captivity AND finish the level without dying after getting them or else they become recaptured and you lose them from your count towards your end total. You can still get the trophy if you lose prisoners during your level playthrough as long as you have 10 by the time you finish the level.

The first level is probably the easiest to get this trophy as the level itself isn't that difficult to complete without dying. The location of the missions prisoners are as follows:
 

(Note: The video shows the locations of all the prisoners throughout the level even if I don't have them all still saved by the end)

• 1: He will be in the back of the truck near the beginning of the stage
• 2: On a falling parachute platform along with an enemy
• 3 & 4: They are hanging from the top of the screen when you go down in the sewer/under
  bridge area
• 5: Girl walking with a backpack on walking in the sewer/under bridge area
• 6 & 7: Another set hanging from the top of the screen in the sewer/under bridge area
• 8: Will run at you from the right side of the screen at the start of the boss fight
• 9: After defeating the first part of the boss, he will come from the right side of the screen
• 10, 11 & 12+: During the final part of the boss fight, they will come from the right side of the screen one at a time (only used one picture to show it) *Depending on how long you take to finish off the final boss will indicate how many of them will appear, the longer the battle, the additional ones will come, the shorter, possibly only one of them will make it*