sidneycat hi! I have published my game "Capital Map Flag" about a week ago. It's a simple trivia game with three modes ( Guess the Capital, guess the Flag
and guess Location). It's have localisation for three languages (English, Russian and Hebrew). I haven't a lot of downloads but for now the game at rank 33 in Free Top Trivia in Israel, 37 in Russia, 195 USA etc.
I guess you looking for something more adventure or puzzle type games for Facebook platform. But anyway...