So I received the KGMK package today. It's beyond what I had even imagined. I believe what I have here is everything that was ever made for the keyboard. It looks like it even has the upgraded ROM chip for the additional overlays. There is a bit of paperwork that was included as well. It states the upgraded ROM chip not only adds the new game overlays, but also includes the original 41 game/keyboard overlays. There's a lot to unwrap here. In the meantime, here is the overlay (matt) list:
New / Sealed
Aces of the Pacific
Air Warrior
ATAC - The Secret War Against Drugs
Task Force 1942
Birds of Prey
Civilization
F-14 Fleet Defender
F-15 Strike Eagle II
F-117A
Flight of the Intruder
Jet Fighter II
Jump Jet
Keyboard ABC
Keyboard Qwert
Kids Board
Mantis Experimental Fighter
Megafortress
Red Storm Rising
Silent Service II
Special Forces
Spectre
Strike Commander
Ultima Underworld
Ultima Underworld II
Ultrabots
Wing Commander
Wing Commander: Academy
Wing Commander: Privateer
World Circuit
Used (but in good condition)
1942 The Pacific Air War
A-10 Tank Killer
Aces Over Europe
A.T.P. Airline Transport Pilot
B-17 Flying Fortress
Chuck Yeager's Air Combat
Comanche Maximum Overkill
F-15 Strike Eagle III
Falcon 3.0
Flight Simulator 4.0
Flight Simulator 5.0
Gunship 2000 & Mission Builder
Hornet Naval Strike Fighter
Keyboard Qwert
MiG-29: Deadly Adversary of Falcon 3.0
Red Baron
Secret Weapons of the Luftwaffe
Stunt Island
Tie Fighter
Tornado
X-Wing
At least this now confirms all of these overlays (matts) were actually produced way back in the early 1990s. I think those who own this keyboard oddity suspected they might exist from this archived
order form. Cheers for now!