The The Barnyard Battle Title update for Rubber Hose Rampage has 5 achievements.
Clear the fourth bonus level; "The Goose that Laid the Golden Egg" and get rewarded with Felix as a playable character.
Clear the fifth bonus level; "Winnie-The-Pooh and Some Bees" and get rewarded with Winnie-The-Pooh as a playable character.
Clear the sixth bonus level, The Plowboy, and get rewarded with Horace Horsecollar as a playable character.
Clear the seventh bonus level, TinTin in the Land of the Soviets, and get rewarded with TinTin and Snowy as a playable character.
Clear the eighth bonus level, The Barnyard Battle, and get rewarded with the new Mousetrap weapon.