Grind Stormer (Genesis)

Grind Stormer
Also known as: V-Five (JP) Developer: Tengen Publisher: Tengen Platform: Genesis Released in JP: March 25, 1994 Released in US: 1994 This game has debugging material. This game has a hidden level select.

Grind Stormer sounds obscene, but it's just a shooter ported from arcade.

Free Play

Hold A+B+C at the title screen and tap the Start button 100 times in total to unlock Free Play in the Credit Limit selection in the options menu.

(Source: GameFAQs)

Debug Mode

Originally, the Training selection in the options menu had a total of four settings: NO, YES, NO (DEBUG), YES (DEBUG). The last two, as seen in the pictures above, require bit 0x02 set in memory address $FFDAD7, but the menu normally only deals with the first two (bit 0x01).

Use these game enhancer codes to enable the debug mode:

Action Replay	009D32:661A 00A506:6722 00AD92:6636 00D48C:671A	Each code corresponds to one of the four sets of effects available in the section below. Use just the first code for the Skip Stage enable, for example.
Action Replay (alternate)	0032CC:4E71 0032D2:0C01 0032D4:0004 0032D6:6D02 0032D8:4241	Restores the debug settings in the Training selection in options.
Game Genie	DLRT-AN3W ELWT-AR2G G40T-AN6W DMLA-AR6N	Each code corresponds to one of the four sets of effects available in the section below.
Game Genie (alternate)	RE3A-A60N AE3A-A2GW AT3A-AAGY AJ3A-A480 JE3A-AE02	Restores the debug settings in the Training selection in options.

Skip Stage

Press C to instantly advance to the next stage. Sets memory addresses $FFD96A to 0001 and $FFD968 to FFFF.

Pause Effects

Pause the game, and use the following buttons:

• Controller 1
  • Up: Increase progress in stage.
  • Down: Decrease progress in stage.
  • Right: Modify ship.
  • Left: Modify speed (memory address $FFD948, range $0000-0007).
  • A: Unknown.
  • B: Unknown.
• Controller 2
  • A: Add points (10s).
  • B: Add points (1000s).

Adding enough points can give extra lives and break the high score.

Debug Display

Debug information is located on the right side of the screen.

Invincible

Invincible to bullets and enemies.

(Source: JLukas)