Undertale Demo OST
| Composed by | Toby Fox |
| Published by | Toby "Radiation" Fox (distributed by Bandcamp) |
| Release type | Game Soundtrack - Official Release |
| Format | 1 Digital - 16 tracks |
| Release date | May 21, 2013 |
| Duration | 00:24:54 |
| Genres |
| 1 | Once Upon a Time | 01:27 |  |
| 2 | Menu | 01:36 | |
| 3 | Your Best Friend | 00:46 | |
| 4 | Fallen Down | 01:24 | |
| 5 | Ruins | 03:03 | |
| 6 | Anticipation | 00:20 | |
| 7 | Unnecessary Tension | 00:13 | |
| 8 | Enemy Approaching | 01:50 | |
| 9 | Ghost Fight | 01:42 | |
| 10 | Determination | 00:46 | |
| 11 | Home | 02:03 | |
| 12 | Heartache | 03:36 | |
| 13 | End | 00:32 | |
| 14 | Nyeh Heh Heh! | 00:32 | |
| 15 | Home (Music Box) | 02:03 | |
| 16 | Empty House | 03:01 | |
