In a small saucepan, bring beer to a boil. Remove from the heat and cool to room temperature.
In a food processor, combine the beer, cream cheese, blue cheese, mustard, onion, pepper sauce and garlic. Add cheddar cheese; cover and process until well blended. Transfer to a bowl. Cover and refrigerate overnight.
Let cheese stand at room temperature for 30 minutes before serving. Serve with crackers.