I was at a flea market yesterday when I stumbled upon a prototype of Stampede for the Intellivison. Despite me buying the cartridge, I actually do not own an Intellivison, so I have no idea whats on the cart. Here are some pictures:
https://cdn.discordapp.com/attachments/385538144122175488/495831936816906250/image0.jpg
https://cdn.discordapp.com/attachments/385538144122175488/495831936351076352/image1.jpg
https://cdn.discordapp.com/attachments/385538144122175488/495831937265565726/image2.jpg