Penny Arcade's On The Rain-Slick Precipice Of Darkness Episode 4 OST
| Composed by | HyperDuck SoundWorks |
| Published by | HyperDuck SoundWorks (distributed by Bandcamp |
| Release type | Game Soundtrack - Official Release |
| Format | 1 Digital - 30 tracks |
| Release date | June 16, 2013 |
| Duration | 01:18:30 |
| Genres |
| 1 | Title Theme | 01:24 |  |
| 2 | Airship | 02:40 | |
| 3 | Battle! | 02:57 | |
| 4 | Boss Battle! | 03:36 | |
| 5 | World Map | 02:20 | |
| 6 | Town | 02:58 | |
| 7 | Caverns | 03:12 | |
| 8 | Living Train | 01:49 | |
| 9 | Castle Brahe | 01:49 | |
| 10 | Tycho | 01:51 | |
| 11 | Desert | 02:20 | |
| 12 | Fish Force | 02:59 | |
| 13 | The First Pillar - Climbing the Tower | 03:04 | |
| 14 | Jungle | 03:48 | |
| 15 | Corrupted Temple | 03:19 | |
| 16 | Off to Adventure | 04:15 | |
| 17 | The Second Pillar - Yggdrasil | 03:12 | |
| 18 | Steam City | 03:12 | |
| 19 | Battleground | 03:05 | |
| 20 | The Third Pillar - Future Tower | 02:20 | |
| 21 | In the Belly of the 4th God | 02:44 | |
| 22 | Final Boss! | 03:01 | |
| 23 | Victory | 00:26 | |
| 24 | Defeat | 00:24 | |
| 25 | Airship (Faux SNES) | 02:42 | |
| 26 | Battleground (Faux SNES) | 03:13 | |
| 27 | Tycho (Faux SNES) | 02:41 | |
| 28 | Crystal Sewers (Episode 3 DLC) | 02:18 | |
| 29 | Shanty Town (Episode 3 DLC) | 02:33 | |
| 30 | Credits | 02:18 | |
