Lockhart Zoo

1/2 oz gin
1/2 oz vodka
1/2 oz light rum
1/2 oz blackberry brandy
1/2 oz triple sec
1/2 oz banana liqueur
2 oz Heineken lager
1 oz grenadine syrup
1 oz lime juice
1 oz orange juice
2 oz sweet and sour mix

Shake all ingredients except beer in a cocktail shaker with ice. Pour over ice. Add beer on top.