Successfully complete the In Space, No-One Can Hear You Clean campaign.
Jet Pack challenge 3
Successfully complete the Hold Until Relieved campaign.
Level Generator
Not only can you type in numbers to generate levels, but you can also type in words and it will convert it for you.
Mad Cows
Complete all three shotgun challenges with a 'Gold medal' rank.
Nuclear Bomb
To unlock the Nuclear Bomb, complete all ten deathmatch challenges. If it does not work with all bronzes, try to get silvers and golds.
Parachute challenge 1
Successfully complete the Falling For You campaign.
Parachute challenge 2
Successfully complete the Worm and the Beanstalk campaign.
Parachute challenge 3
Successfully complete the Costa Del Danger campaign.
Super Sheep
To unlock the Super Sheep, complete all Super Sheep challenges with a 'Gold medal' rank.
Super Sheep challenge 1
Successfully complete the High Stakes campaign.
Super Sheep challenge 2
Successfully complete the Plaice Holder campaign.
Super Sheep challenge 3
Successfully complete the A Good Nights Sheep campaign.
Teleporting
In levels where there are objects floating in the air, if you teleport onto them sideways, there is a chance that you will actually teleport inside the object. This is especially true for the green air ships.
Voice Change
If you type in "team17" on the keyboard in the Quick Fix mission then you will unlock French Lover's voice.
