I'm looking for some stories about this game. Maybe someone can share some stories about how prototype production went at the time, and maybe what they were planning to do on this game. There are many loose connectors and cut wires which hint about features that never made it to production.
I did not notice any differences in the software.
Some sound effects are different. Especially speech on right ramp shots have some special effect which is not in production.
There is some strip of metal welded to the castle ramp. Different text on playfield.
Asylum scores 25M
Different VIDEO colors
No metal guard on ramp, instead some posts. You can see through the plastic.
Notes on the lamp board.
Install 3 balls. The software requires 4.
Red prototype board for game-specific features.
(Now I'm going to put some mylar and metal protectors on it)