Metal Gear Ac!d & Ac!d² Original Soundtrack
| Composed by | Akihiro Honda / Masashi Watanabe / Nobuko Toda / Ryoji Makimura / Shuichi Kobori / Zachary Quarles |
| Arranged by | Akihiro Honda / Masashi Watanabe / Nobuko Toda / Shuichi Kobori |
| Published by | Konami Multi-Media |
| Catalog number | GFCA-36~37 |
| Release type | Game Soundtrack - Official Release |
| Format | 2 CD - 85 Tracks |
| Release date | December 21, 2005 |
| Duration | 02:04:54 |
| Genres |
| 1 | METAL GEAR AC!D | 00:52 |  |
| 2 | Intermission | 00:57 | |
| 3 | Conspiracy | 01:49 | |
| 4 | NEKAL Commercial | 00:07 | |
| 5 | On Alert | 00:59 | |
| 6 | Leone | 01:36 | |
| 7 | Briefing | 00:05 | |
| 8 | Elsie & Francis | 01:36 | |
| 9 | First Mission | 01:23 | |
| 10 | Undercover Action | 01:38 | |
| 11 | Control Office | 01:28 | |
| 12 | Egersis | 01:55 | |
| 13 | Minette | 01:07 | |
| 14 | Dream Land | 01:46 | |
| 15 | BRC | 01:29 | |
| 16 | Ritual of the Swarm | 01:32 | |
| 17 | Leone Forces | 01:36 | |
| 18 | Residential Quarters | 01:24 | |
| 19 | Power House | 01:51 | |
| 20 | Interval of Dark | 01:44 | |
| 21 | Niko² | 01:36 | |
| 22 | FAR | 01:29 | |
| 23 | La Clown | 01:52 | |
| 24 | Death of Swallowtail | 01:09 | |
| 25 | Frisson | 01:37 | |
| 26 | Metal Gear!? | 01:29 | |
| 27 | Vs. Metal Gear | 03:37 | |
| 28 | Alice | 01:33 | |
| 29 | Roger's Confession | 01:58 | |
| 30 | End Title | 03:41 | |
| 31 | MGS1 Pack | 00:23 | |
| 32 | MGS2 Pack | 00:29 | |
| 33 | MGS3 Pack | 00:34 | |
| 34 | Chronicle Pack | 00:32 | |
| 35 | Link Battle | 01:47 | |
| 36 | Link Battle Rush | 00:42 | |
| 37 | Sweeties | 00:40 | |
| 38 | Mission Start | 00:07 | |
| 39 | Mission Failed | 00:07 | |
| 40 | Mission Complete | 00:07 | |
| 41 | Metal Gear -Remix- | 01:59 | |
| 42 | Bonus Track -Sound Effects- | 03:02 | |
CD 2
| 1 | METAL GEAR AC!D² | 01:22 | |
| 2 | Intermission | 01:05 | |
| 3 | VR Training | 01:32 | |
| 4 | Flight | 01:44 | |
| 5 | Touch & Go | 01:20 | |
| 6 | Willing to Hear Me Out Now? | 02:05 | |
| 7 | Opening Title | 01:30 | |
| 8 | StrateLogic Inc. | 01:30 | |
| 9 | Control Section | 01:33 | |
| 10 | B.B. | 01:15 | |
| 11 | Research Block | 02:03 | |
| 12 | Single Action | 00:59 | |
| 13 | Takiyama & Lucy | 01:38 | |
| 14 | Security Unit | 01:16 | |
| 15 | Test Subject Awakens | 00:40 | |
| 16 | Test Subject Burns | 01:54 | |
| 17 | Venus | 01:45 | |
| 18 | Playtime | 01:41 | |
| 19 | Seeking Takiyama | 01:16 | |
| 20 | The Essence of Vince | 01:51 | |
| 21 | Track Tracking | 01:19 | |
| 22 | Locomotive Motion | 01:00 | |
| 23 | Revenge of Kopelson | 01:21 | |
| 24 | Destruction | 01:29 | |
| 25 | Residential Area | 01:33 | |
| 26 | Memories | 01:19 | |
| 27 | Back-to-Back | 01:35 | |
| 28 | Metal Gear Prototype Factory | 01:30 | |
| 29 | Resurrection | 01:43 | |
| 30 | ??? | 01:34 | |
| 31 | Farewell, Vince | 01:49 | |
| 32 | Like a Flood | 01:35 | |
| 33 | Chaioth Ha Qadesh | 01:57 | |
| 34 | We Can Become One | 01:45 | |
| 35 | Lucy & Chaioth Ha Qadesh | 02:09 | |
| 36 | Hypocrisy | 00:53 | |
| 37 | Test Subjects Duality | 02:18 | |
| 38 | The Great Escape | 01:29 | |
| 39 | End Title | 04:19 | |
| 40 | See That, Snake? | 01:33 | |
| 41 | My Love | 01:08 | |
| 42 | Information Fanfare | 00:05 | |
| 43 | Opening Title -Remix- | 02:08 | |
