At the moment, not all the songs are here. There are a lot of them, but I took the most popular ones that I know.
For example, I took almost all the songs (or all of them) from 1 comic book.
Some soundtracks name:
City
Bridge
Area 52
Slender Forest
To play music, you only need a command:
/playsound <sound> <source> <target> [<position>] [<volume>] [<height>] [<minimum volume>]
The Pixel Gun 3D Soundtracks Team
