Unlock Banana Bomb
Complete Shotgun Challenge 3.
Unlock Bridge Kit
In the Beefcake Breakfast, get the crate on a rooftop.
Unlock Earthquake Weapon
Complete Jetpack Challenge 3.
Unlock Mad Cows
Complete Shotgun Challenge 3 with all golds.
Unlock Super Sheep
Complete Sheep Challenge 3.
Unlock Nuclear Bomb
Complete Deathmatch Challenge 10 with all golds.