What I think is the Most Underseen Gaming Franchise
Metroid.
For some reason, I just don't think it gets the credit it deserves. The original game was just so great compared to other games of it's time. Even the name was too cool for games in that decade.
It's Debut was what I consider one of the best. When you think of huge gaming franchises that have been around, the debut's hardly compare. Mario came with Donkey Kong, hopping over Barrels, fun. GTA, it was basically like any free racing flash game that you can find anywhere on the internet. But Metroid... The game was epic. Going through space, using a number of differant weapons and upgrades to make your way through, the variety in the bosses, from Huge Dinosaur like monsters to the Mother Brain. Mario Bros. didn't have that now, did they.
It's transformation into Metroid Prime is almost unbelievable, seeing the whole entire world the way Samus would see it. Maybe with some types of online multiplayer, it could be even better.
For series that should be better appreciated, I'd say Metroid should be one of them.