I’m happy to report that the Intro to Protos feature is achieving its goal in helping to open up the prototype world to more people.
One of these new aficionados, who wishes to remain anonymous, sent me five NES prototypes to look at and document. (Click on the carts for more information.)

First, a prototype of the surprisingly solid unlicensed Christian game, Spiritual Warfare, which is chock-full of differences.

Little Samson may just be one of the biggest sleeper hits on the NES, and the game also makes for a pretty interesting prototype.

This first-party Nintendo prototype of Wario’s Woods is anything but “final,” but I have yet to find out what exactly is different.

Next up is Romstar’s Thunder & Lightning. Unfortunately, this proto is the same as retail, so I have only uploaded the following photos for archiving purposes: Front Cart / Back Cart / Front PCB / Back PCB

Bringing up the rear is Impossible Mission, another prototype identical to the released game: Front Cart / Back Cart / Front PCB / Back PCB