Count from 1 to 20 with increasingly difficult rules to remember.
Designer: Lena Burkhardt, Günter Burkhardt
Artist: Rolf Vogt
Publisher: 999 Games, Drei Magier Spiele, Gém Klub Kft., Gigamic, Möbius Games
In Biss 20, you count from 1 to 20 together, with each player saying one number in turn.
Okay, that sounds simple! And it would be if not for Fritz the bat who keeps coming up with new rules that you need to remember — and just when you've remembered one rule, he's already waiting around the corner with the next one. How many rules can you recall?
—description from the publisher