Each player controls colored mice and tries to collect pieces of cheese in Castle Appenzell. On their turn, players spend action points to put new mice into play, reveal corridors in the castle, move their mice around the castle, or push a tile into play, which changes the maze of cheese pieces underneath. If two of a single player's mice reach a place with the same kind of cheese showing, the player obtains a piece of this cheese. The first player with 4 different pieces of cheese wins the game.

Awards

• 2009 Golden Ace Children's Game of the Year.
• 2009 Guldbrikken Årets Børnespil (Best childrens game), Denmark, Nominee
• 2008 Games 100 Best Family Game Nominee.
• 2008 Årets Spel Best Children's Game.
• 2008 Årets Barnespill (Children's Game of the Year, Norway)
• 2008 BoardGameGeek Golden Geek Best Children's Game
• 2007 Spiel des Jahres Recommendation.
• 2007 Essener Feder Winner.
• 2007 Dice Tower Awards, Best Family Game Winner.
• 2007 Deutscher Spiele Preis Children's Game of the Year
• 2007 Major Fun Award Winner.

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