Closed In Upon Me (Round 2, 5)
Closed In Upon Me (Round 2, 5) plays in the second and fifth rounds prior to morphing into a beast.
Altered Beast (ARC)
This is the original composition of Closed In Upon Me as composed by Tohru Nakabayashi.
The song plays on a YM2151 and is internal song number 0x95.
Altered Beast (GEN)
The Genesis version plays on the YM2612.