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