Well... the thing is, at least AFAIK, that Hungarian game developers weren't present on the international market in older times, and so even if there were some games developed, they were made in Hungarian.
A certain line of text adventures jump to mind, developed by Istv�n R�tkai, which were deviously difficult, yet enjoyed large-scale popularity. However, like I've said, they are in Hungarian.
Well, i think i can handle a dictionary. ;P I see a list of games dev'd in Hungary, but it requires filtering, because i see Battlestations: Midway/Pacific there, for example.
That list made me remember one awesome gem - Scarabaeus, a great FPP-puzzler, but that was on a C64. I see Reunion was also Hungarian.
Take a look Yourself: http://en.wikipedia.org/wiki/Category:Video_games_developed_in_Hungary
But i seek hidden treasures. I bet there are some, every country has them. :)