Steins;Gate 0 (Windows)
Steins;Gate 0 is the follow-up of the original story Steins;Gate, which takes place in the β worldline.
The article may contain spoilers.
BG02N4.png is an unused background of the Future Gadget Laboratory that was leftover from Steins;Gate Senkei Kousoku no Phenogram.
Song02.ogg is an unused variation of Gate of Steiner that can be found in the game's sound library. The lyrics are different, the instruments are altered, and certain effects in the background have low quality in comparison to the original track.