In Inspektor Hase, players use their rabbit inspectors to hunt down crooks – but every crook has a twin, and you can arrest a crook only when you can nab the pair of them.
How do you catch the crooks? When one of your rabbit inspectors lands in a search area, you can turn the two face-down tokens located there face up. Plop another rabbit into a second search area which turns out to have a matching crook, and you can claim the two of them. Depending on the number of players, the first person to capture three or four pairs of crooks wins.