Oh, wait, that's right! There is no "trample." In fact, there's no interaction with the animals of any kind. You don't even get the satisfaction of oddly petting them like in Endless Ocean. With Afrika, you get an African safari simulator and little else. Which really makes it hard for us to even classify Afrika as a "game" as opposed to edutainment. Sure, there are assignments and "challenges," should you so choose to engage them, but there is little (if any) real progression through the experience.
Better cameras do unlock as you complete assignments and a whole mess of National Geographic footage/stills/information also serve to reward various complete objectives, but none of this makes the "game" any more game-ey. Those of you looking for an interactive African safari simulation, Afrika is for you. For those of you whose first interest is seeing if you can run down a rhino, look elsewhere -- this "game" ain't for you.