The Decisive Battlefield is a cosmic location with rocky ground. The land is ablaze, though this does not affect gameplay. A ruined structure is settled in the distance. In the background, a planet appears to be surrounded by a circular vortex, and giant stones revolve around it. This background changes from different shades of blue to purple.
During The True Final Battle, the area changes drastically. The vortex moves from the left side of the screen to right, and is much closer to the land. The rocky ground is purple and no longer flaming. The ruins are gone, instead replaced with colorful, small stellated dodecahedrons. These prisms, coupled with the symbols that float through the air, suggest that the battle takes place in or around Another Dimension.