Grid Seeker: Project Storm Hammer

Grid Seeker: Project Storm Hammer
Developer: Taito Publisher: Taito Platform: Arcade (Taito F3 System) Released internationally: December 1992 This game has a hidden developer message. This game has a hidden level select.

Grid Seeker: Project Storm Hammer is a Gulf War-themed shoot 'em up.

Level Select

This game uses the Taito Code:

1. Hold the Service Coin button upon booting, and wait until a "SERVICE SWITCH ERROR" message pops up on the screen.
2. Press 1P Start (x3), Service Coin, then 1P Start again.

Upon this, the text changes to "ROUND SELECT MODE", and the game boots. Upon selecting a character, the player is redirected to a level select screen. Pressing 1P Up/Down changes the level, and 1P Button 1 selects.

(Source: RyogaMasaki)

Developer Messages

A series of Sailor Moon mostly referencing Sailor Mercury (though there's a single Sailor Jupiter reference in here) can be found throughout the main CPU. The first message is at 0x6A12E and 0x6E1CC:

Mercury power make up

The second variant is at 0x70B6A and 0x83470:

Mercury Power Make Up !

Another version is stored at 0x71D22, 0x71D52, and 0xA56E4:

Mercury power make up!

More of the same at 0x7787E:

Mercury Power Make Up!

The Sailor Jupiter reference is at 0x802B4:

  Jupiter Power Make up!                  

And the final variation is stored at 0x802E0 in the main CPU:

mercury power make up !

(Source: RyogaMasaki)