Found 1 rating (with comment) on this game

This game as UNOBTAINIUM as it is overall, really boasts several really unique features for the period.
I have had the opportunity to play it ONCE for a couple of hours and conduct a detailed analysis.

The first feature and the most notable, the hidden animated (rotating) "Loch Ness" monster in the playfield window which is "revealed" during gameplay and during multiball.
John Trudeau took inspiration from this game when he developed Creature from the Black Lagoon.

The second was the integrated artwork inspired both on the playfield and backglass.
This machine was Seamus McLaughlin's greatest artwork pinball contribution with a secondary notability to Cyclopes produced the same year.
The backglass is just completely stunning and amazing in every respect for a pinball machine.
Almost too good to be in an actual game.
There were a number of confirmed additional backglasses (~15) made for this title, but the machines were never built.
Most have been lost to time, and they have never been reproduced.
I own one of the additional spare backglasses (and will NEVER sell it), but would fight to get a copy of the original drafted hand drawn version from the artist himself.
I *might* be willing to let CPR borrow it someday for reproduction if needed.

There have been reported rumors there was a second FUNCTIONAL prototype was made, but I have never confirmed the information after exhausting all efforts with network contacts.

Nearly everything on the existing lower bottom half of the playfield was either "handmade", or cobbled together from existing parts from other titles, but actually is very well polished for a prototype.
The top level of the playfield does NOT look like a prototype either with the playfield itself or plastics.
It looks as though the game was "ready to go" into production, as is equally well polished with its nautical theme.
The significant number of drop targets is quite unique for a Game Plan machine, and has some playfield game shot and layout similarities to Bally's Fathom.
Sounds of the prototype are average as most were recycled from other Game Plan games of the period.

This certainly could have been Game Plan's greatest accomplishment but was at a period of the company's waning success.
Game Plan will remembered predominantly for their "cocktail" pinball machines, which certainly were not terrible machines but many had various reliability issues.

I uploaded 86 photos from the second owner.