| MIDI |
| Nec_b01 | Nec_m01 | Introduction story. |
| Nec_b02 | Nec_m02 | Union's turn. |
| Nec_b03 | Nec_m03 | Xenon's turn. |
| Nec_b04 | Nec_m04 | Union winning. |
| Nec_b05f | Nec_m05f | Title screen. |
| Nec_b05l | Nec_m05l | Title menu. |
| Nec_b06 | Nec_m06 | Union losing. |
| Nec_b08 | Nec_m08 | Game manual. |
| Nec_b09 | Nec_m09 | Xenon losing. |
| Nec_b10 | Nec_m10 | Nectaris planet map. |
| Nec_b11 | Nec_m11 | Password screen. |
| Nec_b12 | Nec_m12 | Xenon winning. |
| Nec_b13 | Nec_m13 | Factory Captured! |
| Nec_b14 | Nec_m14 | Game Over. |
| Nec_b15 | Nec_m15 | Level complete and winning statistics. |
| Nec_b15f | Nec_m15f | Level complete. |
| Nec_b15l | Nec_m15l | Winning statistics. |
| Nec_b16 | Nec_m16 | Union last level. |
| Nec_b17 | Nec_m17 | Xenon last level. |
| Nec_b18 | Nec_m18 | Victory and ending. |
| Nec_b18f | Nec_m18f | Victory. |
| Nec_b18l | Nec_m18l | Ending. |
| Nec_mugm | Unknown. |
| MUSIC/SOUND EMULATION |
| HES | PC-Engine/TurboGrafx 16. |
