Quoted from BigAl56:There is no, nor was there ever, a master list of games vs key number. When I worked for Bally we would get calls from time to time somebody asking us to send them a replacement key for game serial number xxxx. Like we would even if there was. The only master key I was aware of was the 1333 key for the back of all Midway video games.
I used to break into backboxes by carefully hammering a slotted screwdriver into the lock and turning with a wrench just enough to get the backglass up and out. However before you start check the cabinet. A lot of backboxes are broken into when the key is hanging safely on the hook inside the front door.
I know a lot of Midway video games were keyed 1350, never heard of 1333. And a lot of Stern videos were L-355
With thanks to Ken Layton, I found this...
Galaxian: Fort Lock #1350 (double bit)
Pacman: Fort Lock #1350 (double bit)
Gorf: Illinois Lock # MW350 (double bit)
Ms. Pacman: Fort Lock # 1355 (double Bit)
Virtually all Stern cabinets used Fort Lock #L-355 (single bit).
English Mark Darts: National Lock # C-415 (single bit)
Neo-Geo: National Lock # C-413 (single bit)
Nintendo cabinets: Key # K-6510 (round Ace style)