Voices
Go to the giant keyboard in the quick fix mission. Type in "TEAM17" by walking to a letter and pressing "B" to jump. This command unlocks the French Lover's voice option, which you can use on your worms. To unlock the Horror Voice, throw a grenade onto the mound of dirt next to the big chapel in the Grave Danger level. Complete the level Nobody Rides for Free without destroying any of the pay booths to earn the Grandpa voice.
Level Generator
Go to the Level Generator and enter "sugarcult" to play in a large winter wonderland. For a pirate themed-map with a cave enter, "delish". Input "macy" for a horror-themed level with lots of small islands. The code "257462320" generates a map with a very small amount of ground and a little bridge. Enter "strongbadia" for a lunar map with lots of explosives scattered around. "Smashfruit" sets up a small island that will immediately explode, killing all of the worms.
Challenges
Players can unlock Jet Pack Challenge 03 by completing the Hold Until Relieved campaign. Receive Super Sheep Challenge 03 for clearing A Good Night's Sleep. Complete Costa Del Danger to earn Parachute Challenge 03. Finish the D-Day campaign to unlock Deathmatch Challenge 01 and complete the Deathmatch Challenge 01 to unlock Deathmatch Challenge 02. This process continues until you acquire the tenth and final Deathmatch Challenge.
Weapons
Complete Super Sheep Challenge 03 to unlock the Super Sheep weapon. Banana Bombs are available after clearing "Parachute Challenge 03. Earn the Earthquake weapon for beating Jet Pack Challenge 03. Pass the Test Tube Training to unlock the Pro Weapon Scheme. Get a Gold award for your performance in Hold Until Revealed for the All Action Weapon Scheme. A Gold award on Hook, Line and Sinker earns the Pro Weapon Scheme.