Time Hollow, apart from being the title of the game, is also the title of the main theme song. The song was composed by Masanori Akita and performed by Mouse. The song can be heard during the game's attract mode (when the start menu is left idle), in trailers, as well as in the Prologue and the ending credits (in overseas versions).
The song was created mainly for the game, and focuses on the theme of changing the past. The version heard in the attract mode and prologue only uses the first two and final two verses, whereas the entire song can be heard in the ending credits.
- There are times in-game that Ethan receives phone calls and his cell phone's ringtone can be heard. The ringtone is, indeed, Time Hollow, only without lyrics and slightly modified to sound more electric.