Extra Challenge was created on 1999-03-01.
Extra Challenge ended on 2006-05-26.
The duration of Extra Challenge is 2700.0 seconds.
In Uno, the challenge feature allows a player to challenge another player if they suspect that the player didn't follow the rules. If the challenge is successful, the player who made the mistake must draw extra cards. If the challenge fails, the player who made the challenge must draw extra cards instead.
The Challenge Trophy was created in 1912.
Aztec Challenge was created in 1982.
Basketball Challenge was created in 1987.
Chip's Challenge was created in 1989.
The Fairchild Challenge was created in 2002.
Challenge Stakes was created in 1878.
Bushido Challenge was created in 2009.
Winter Challenge was created in 1991.
Dark Challenge was created in 2000.