man, are you serious?
SNK are the masters of those incredible 2D fightings, shmups and several RPGs, mostly known as the developers for arcade units. they created such legendary games as: KoF (King of Fighters 'XX, where XX stands for the year of release) series, Metal Slug series (hopefully you heard at least something about this superior run'n'gun), Samurai Showdown great fighting series and tons, no TONS more of heart-pounding software. now type any of these names into the search field of youtube and make yourself sure those are stunning games!
I strongly recommend that you also check out Crystalis under our beloved emu, JNES, since it's one of the coolest action-RPGs of its time beyond Zelda! now guess who created it. yep, it's those top SNK folks behind the awesome Crystalis!
damn, almost forgot those were SNK blokes who had brought an arcade-perfect experience home by creating NEO-GEO, the most powerful console of its time 'cuz it was capable of running any (!) SNK arcade game in non-compromised way meaning it needed no optimization to convert any game, unlike Genesis or SNES systems which conversions had lots of simplifications since they just couldn't run that software in its original form - leading to poor experience... ah, and NEO-GEO was unpopular because of its initial retail price of 600 bloody bucks!
too expensive for everyone to get a hold of it...