In Raupenrallye, you want to be the first to get your seven caterpillars from one side of the apple to the other. On the apple game board are two lines of holes, with the lines crossing at the core and with each line having three holes on either side of the apple.
On a turn, you roll the four-sided die, and (if you don't roll a 4), you move one of your caterpillars that many spaces, either from the start area next to the game board or from wherever it is on the game board. If you land a caterpillar on the core, you move it immediately to the goal space off the game board. If you do roll a 4, roll the dice again; if you once again roll a 4, you must return one of your caterpillars on the board to the starting space; if you roll anything else, then you can move a caterpillar from the starting space to the core, then an additional 1-3 spaces depending on what you rolled.
If you manage to fill all three spaces on one half of a line with your pieces, you immediately move all three pieces to the goal.