Get at least bronze in all training modes to open up bonus scheme 1. To find it go to the multiplayer mode and go through the different schemes untill you find one that says bonus 1. this unlocks the priceless ming vase and the girder starter pack.

To avoid having a worm shot by the enemy (especially useful in deathmatch and mission play), simply have your worm stand on their head. Unless that enemy worm's turn is next, they won't shoot you because they don't know when to sacrifice a worm to make a kill.

Find an enemy worm standing close to the edge of the level. Use the baseball bat to hit him into the water to get a "homerun" complete with baseball bat cracking sound, baseball message(like "It's Outta Here", or "BasesLoaded"), and organ music.

To be able to play all the missions in single player mode, you must get a gold medal in the first training mode. After you have done this with a particular team, that team will then be able to play all the missions in mission mode.