Tail of the Sun OST - Hidden Track (Main Theme from Artdink's Emergency Stairs)
The theme song of "Tail of the Sun" self-made was put on the track that can be heard by reading the PS1 game disc by audio. Recorded in the atrium of the emergency stairs in the Artdink building where the company is located:
https://news.denfaminicogamer.jp/kikakuthetower/180124
Tail of the Sun, known in Japan as Taiyō no Shippo: Wild, Pure, Simple Life (太陽のしっぽ WILD・PURE・SIMPLE LIFE, Taiyō no Shippo Wairudo, Puru, Shinpuru Raifu), is a 3D action and role-playing video game developed by Artdink and released on the PlayStation. The player's ultimate objective is to build a tower of mammoth tusks that reaches the sun. To this end, a large map full of various creatures and oddities must be traversed in an effort to locate and gather sufficient food for the tribe to thrive and multiply.
https://en.wikipedia.org/wiki/Tail_of_the_Sun
Video used: https://www.youtube.com/watch?v=jHiqhhUhQgU