I have eaten crocodile and kangaroo. The strangest would be Cuy (Guinea Pig) but it is not unsual in parts of South America where it is a recognised local dish.
Googling Cuy will give you an idea as to how it is served.
Have eaten most types of African game on a visit to Carnivore in Nairobi, plus guinea pig in Peru, but the most unusual thing I ever ate was sea urchin in Thailand...best avoided, it was bloody disgusting.