The card game Biss 20 by Drei Magier is an entertaining game for 2 to 8 players. The task sounds simple: the group counts together from 1 to 20. However, changing rules and Fritz the bat constantly provide new challenges and surprising twists. Players must stay attentive and remember the currently active rules. A game round takes about 20 minutes. This card game requires concentration and memory and is ideal for sociable game nights with family or friends.