1. NEOGEO SOUND LOGO (NEOGEO Edition)
2. TITLE
3. CREDIT
4. THE MILITARY SYSTEM -X- (Operation Explanation, Ranking)
5. BARRACKS -X- (Character Select)
6. JUDGMENT -X- (Stage 1)
7. STEEL BEAST 6BEETS -X- (Boss Stage A)
8. CARRY OUT -X- (Stage Clear)
9. PREHISTORIC SITE -X- (Stage 2 1)
10. THE CENOTAPH -X- (Stage 2 3)
11. FIRST CONTACT -X- (Boss Stage B, Stage 6 2)
12. LIVIN ON THE DECK -X- (Stage 3 1)
13. ASSAULT THEME -X- (Boss Stage C, Stage 6 1)
14. BACK TO THE CHINA -X- (Stage 4 1)
15. NEW GODOKIN STREET -X- (Stage 5 1)
16. KISS IN THE DARK -X- (Stage 5 2)
17. METAMORPHOSIS -X- (Stage 5 3)
18. FINAL ATTACK -X- (Stage 6 3)
19. END TITLE AGAIN -X- (Final Scene)
20. MS X ENDING (End Credits)
21. GRAVESTONE -X- (Game Over)
22. NEOGEO SOUND LOGO (NEOGEO Edition)
23. CREDIT
24. THE MILITARY SYSTEM (Operation Explanation, Ranking)
25. BARRACKS (Character Select)
26. Blue Water Fangs -The Island of Dr. Moreau- (MAIN THEME FROM METAL SLUG3) (Stage 1)
27. Marine Diver (Stage 1 Alternative Route ~ Ocean Depths)
28. THE UNKNOWN WORLD (Stage 1 Alternative Route ~ Core Facility, UFO Interior Passage 1)
29. STEEL BEAST 7BEATS (Boss Stage A)
30. CARRY OUT (Stage Clear)
31. Midnight Wandering (Stage 2)
32. Snow Cave of Evil (Stage 2 Alternative Route ~ Ice Cave)
33. METAMORPHOSIS (Boss Stage B)
34. Shallow Sea (Stage 3)
35. In the Hard Sea (Stage 3 Alternative Route ~ Underground Channel)
36. ASSAULT THEME (Stage 3 Alternative Route ~ Bridge, Stage 5 2)
37. Secret Factory (Stage 3 Alternative Route ~ Armory)
38. Desert (Stage 4)
39. Pyramid (Stage 4 Alternative Route ~ Pyramid)
40. THE CENOTAPH (Stage 4 Alternative Route ~ Ancient Ruins)
41. Japanese Soldiers (Stage 4 Alternative Route ~ Former Regular Army Hideout)
42. Into the Sky (Stage 5 1)
43. THE KIDNAPPING (The Mars People Arrive)
44. Into the Space (The Void of Space)
45. KISS IN THE DARK (Enemy UFO Interior)
46. FIRST CONTACT (UFO Interior Passage 2)
47. BIOINFORMATICS (UFO Interior Passage 3)
48. ESCAPE (UFO Escape)
49. FINAL ATTACK (Final Boss)
50. END TITLE (Final Scene ~ Staff Roll)
51. GRAVESTONE (Game Over)