Well obviously all the ones that I have written or worked on, clearly. I'm a friggin' game design genius! He said, tongue firmly planted in cheek.
Most of the games that I think deserve recognition already have it. Cyberpunk 2020, Vampire the Masquerade, Mage the Ascension, FATE (or FUDGE, if you want to be pedantic), Traveller, Call of Cthulhu, Feng Shui. It's only when you get into the ones that are more designer-influential than gaming culture influential when you start to see different things popping up.
Space 1889 is underrated as pre-Steampunk I think, most of the GDW games are underrated – given their influence – however 'whack' the system could be. Over the Edge has influenced a lot of designers in a good way.
Then there's the games that most heavily influenced British roleplay and game design, which may have been overlooked by a wider audience. There was the Games Workshop, Romano-Celtic take on RuneQuest, using the Basic System, there was Dragon Warriors – which I've mentioned before – and there was Fighting Fantasy. That was a global phenomenon, but still – I think – had a more profound effect on British gaming. Warhammer Fantasy Roleplay – first edition – is still something that looms large over British design with its black humour, Pythonesque-Peasant focus and grim themes.
From my point of view all of these have some measure of recognition already, so it's hard to pick out anything that deserves it, and didn't get it – at least in some measure.
Hey, thanks for stopping by. I'm an independent RPG (and other games) designer and author. You can check out my stuff via the links at the side of postmortemstudios.wordpress.com. If you feel so inclined, after a look around, you can support me at patreon.com/grimachu, Minds.com/grimachu or steemit.com/@grimjim. Questions and queries are welcome, remember, 'Nullius in verba'!