Within the game's files are various bonus videos that can only be accessed using an executable file included in the same folder; however, this file does not appear on most computers, has to be loaded manually, and appears to be bugged. The bonus videos include a promotional video for the game, and six short videos featuring the game's director Osamu Sato. One of these short videos reveals that the design of Tong Nou is based on Sato's head by directly morphing back and forth between the two.