Vertical Force

Vertical Force is an interesting top-down vertical shoot-'em-up employing 3D to display two different play depths, which the player can move between at will. It operates much like Hudson's other shooter, Star Soldier, except that it's headache-inducing for different reasons.

Debug Menu and Sound Test
Changing in the US ROM ( in the Japanese ROM) from  to  will force the game to load into a debug menu which includes a level select and sound test. The sound test in particular is notably quite nice looking, featuring names for every music track and sound effect and set against a backdrop of a 3D star field which streams toward the player like in that old screensaver. This may suggest earlier plans to make it more readily available.

Development Text
At in the US ROM or  in the Japanese is the following string: VSU DRIVER Version 0.19a,Copyright(c) 1994-95 Hudson Soft,Program : LU.Iwabuchi,Driver : ChaCha-TYPE,Note : Prototype

Near the end of the ROM, at, right by the internal name and gameID included in all Virtual Boy games, are build dates: