In story mode, there is a tower with an enemy called Egg on it. Parachute down to the bottom of that tower where there is a hole. Collect the jewels to get the Easter Egg. Once you complete the level you will be awarded with 1,000 coins.
Caveworm
Complete Mission 25.
Cyborg
Get all trophies.
Destruct And Serve
In story mode, destroy the silver-colored sports car completely to get an Easter Egg. Once you complete the level you will be awarded with 1,000 coins.
Walk up to the car that looks like the DeLorean from the Back To The Future movies. It should fly off, leaving a flame trail behind. If this does not work, shoot it and it will do the jump to 88 mph. You will receive 1,000 coins at the end of the level.
Dino
Beat best times for all challenges (not deathmatches).
Escape From Tree Rex
In story mission, jet pack to the crate with bazooka x2 in it. Shoot into it. Rex's mouth to get the Easter Egg. Collect the jewels to get the Easter Egg. Once you complete the level you will be awarded with 1,000 coins.
Frankenstein
Beat all best times for deathmatches.
Gold Damage
Cause a total of 100,000 points of damage.
Greedy Worm
Collect a total of 500 crates.
Hard Hat
Complete Mission 5.
Holy Hand Grenade
Buy the Holy Grail scheme.
Hot Foot
Trigger a total of 500 mines.
Icarus Potion
Buy the Mega Powers scheme.
Inflatable Scouser
Buy the It's a Mystery scheme.
Magic Bullet
Kill three worms with one shotgun (two shots allowed).
Mike's Secret Laboratory
When you start this mission you should be to the right of the big protective screen. If you go forward slightly you should see a platform to your right. Use a Jet Pack to get up there. There should be a weapon crate up there. If you collect this crate you will get 25 Sentry Guns. Use these on a flat piece of ground. Then at your next turn, go close to the Sentry Gun and fire it at an enemy worm. The Sentry Gun should detect this and will fire lots of bullets at the worm you shot. Note: You can only use one Sentry Gun at a time until it is destroyed - place it carefully. Also, this is not the only other time in the game you can use a Sentry Gun. The other is on the last level, where you only have two of them.
Nice To Siege You
In story mode, jump up on the cliff where the professor is located. Jump off the back, then walk around to find a cave. In the cave will be a worm Easter Egg. Once you complete the level you will be awarded with 1,000 coins.
Nice To Siege You: Easy completion
You must protect the professor for fifteen minutes. Use your weapon on the enemy at the last seconds of your turn.
Professor
Beat story mode.
Queen of Sheeba
Complete Mission 20.
Rocketeer
Use a total of 2,000 units of jet pack fuel.
Royal Knight
Complete Mission 10.
Silver Damage
Cause a total of 50,000 points of damage.
Story Mode Easter Egg Message #1
In the "Carpet Capers" mission, there is a tower with a worm named Egg in it. You can't miss it. If you parachute down that tower you will find a hole at the bottom with jewels in it. Take the jewels and a message saying "You have found an easter egg" will appear. Now when you complete the mission, you will get an additional 1,000 coins.
Story Mode Easter Egg Message #2
In the "Destruct and Serve" mission, destroy the big silver sports car and a message saying "You have found an easter egg" will appear. Now when you complete the mission, you will get an additional 1,000 coins.
Story Mode Easter Egg Message #3
In the "Escape from Tree Rex" mission, just before the T-Rex there is a platform with a crate containing Bazooka x2 in it is on it. Go there and take the bazooka x2. Then, shoot into T-Rex's mouth and a message saying "You have found an easter egg" will appear. Now when you complete the mission, you will get an additional 1,000 coins.
Story Mode Easter Egg Message #4
In the "Nice to Siege You" mission, go to the cliff where the professor is. Jump off that cliff and go right to see a cave with a worm in it( it's weaing a bunny costume). Go into the cave and a message saying "You have found an easter egg" will appear. Now when you complete the mission, you will get an additional 1,000 coins.
Story Mode Easter Egg Message #5
In the "Tin Can Alley" mission, as soon you start, turn around to see a toilet a little bit to the left. Shoot it and a message saying "You have found an easter egg" will appear. Now when you complete the mission, you will get an additional 1,000 coins.
The Beast Within
Kill three worms with one animal weapon.
Tin Can Alley
In story mode, shoot the toilet behind you to the left. Once you complete the level you will be awarded with 1,000 coins.
Unlock Challenges Maps
Win 17 deathmatch battles in a row to unlock the challenges maps.
Unlock Secret Weapon Scheme. The "Kitchen Sink" Scheme
Unlock all of the character sets and you will unlock this scheme in the shop. It costs 2,500 coins.
Weapon Specialist
Cause a total of 8,000 points of damage using the bazooka.