Does anyone else remember playing Electronic Stratego? The version where the identity of each piece was encoded on the bottom with a series of bumps? It was an even more incomplete information game: attacking a piece would only let you know if the piece was higher, lower, or even, instead of revealing the piece's identity. I played it so much as a kid that I can't even think of Stratego without hearing that electronic bomb sound in my head. I feel it is actually a better game than the original.
https://en.wikipedia.org/wiki/Stratego#Electronic_Stratego