Destroy both wings from The Keesi.
Get 50000 points by jumping the longest gap possible during the first to second train on Mission 3.
Collect 12 prisoners on Mission 1.
Collect 14 prisoners on Mission 2.
Collect 16 prisoners on Mission 3.
Collect 18 prisoners on Mission 4.
Collect 19 prisoners on Mission 5.
Collect 20 prisoners on Final Mission.
Collect 19 items on Mission 1.
Collect 75 items on Mission 2.
Collect 17 items on Mission 3.
Collect 80 items on Mission 4.
Collect 52 items on Mission 5.
Collect 14 items on Final Mission.
Finish a mission while being fat.
Beat the game without using a continue (Lv. 3/Normal difficulty, 3 lives).
Beat the game without using 10 continues (Lv. 6/Hard difficulty, 3 lives).
Beat the game with 3 million score or higher (Lv. 3/Normal difficulty).
Finish Mission 5 with a Metal Slug (Lv. 3/Normal difficulty).
Finish Final Mission with a Metal Slug (Lv. 3/Normal difficulty).
Finish Mission 1.
Finish Mission 1 without using a credit (any difficulty, 3 lives).
Finish Mission 1 with a SV-Camel (Lv. 3/Normal difficulty).
Finish Mission 2.
Reach and finish Mission 2 without using a credit (any difficulty, 3 lives).
Finish Mission 2 with a Slugnoid (Lv. 3/Normal difficulty).
Finish Mission 3.
Reach and finish Mission 3 without using a credit (any difficulty, 3 lives).
Finish Mission 3 with a Slug Flyer (Lv. 3/Normal difficulty).
Finish Mission 4.
Reach and finish Mission 4 without using a credit (any difficulty, 3 lives).
Finish Mission 4 with a Metal Slug (Lv. 3/Normal difficulty).
Finish Mission 5.
Reach and finish Mission 5 without using a credit (any difficulty, 3 lives).
Beat the game.
Reach and finish Final Mission without using a credit (any difficulty, 3 lives)