Increase HP, unlimited firepower

Open the folder where you install Worms 4. Open the folder [data], then [databanks].
You should see mission files in [.xml] format. Choose the mission you want to edit, rename it (ex. [DoomCanyon.xml] to[ _DoomCanyon.xml]), then open it with the notepad. Find the human team inventory section, human team section or the weapon delay section (if available) and change the number there to the number that you wish.
After changing, choose the Save As option and save the file as its original name. Start over if you want to change another file.
Code                    Effect
<WeaponName>Ammo</WeaponName>	Changes [WeaponName] to have [Ammo] ammunition(s)
<Energy>HP</Energy>     The worm chosen will have [HP] health point(s)
<WeaponName>Delay</WeaponName>	[WeaponName] will be delayed [Delay] turn(s)


Unlockables
Character sets

There are five different character sets which are unlocked by doing different parts of the game. These sets include hats, hands, eyes and voices.
Unlockable              How to Unlock
Alien                   Complete story mode with time bonuses
Cyborg                  Get all fifteen trophies
Dino                    Complete all non-deathmatch challenges faster than team 17
Professor               Complete story mode
Wormenstein             Complete all deathmatch challenges faster than team 17


The kitchen sink weapon scheme

To unlock the kitchen sink weapon scheme: Unlock and buy all of the character sets and you shall unlock this weapon scheme in the shop. This features every weapon.


Trophies

Throughout the game there are many trophies to add to your collection. They get you alot of money which you need to buy stuff from the item shop.
Unlockable              How to Unlock
Animal lover            Get 200 animal kills (this accumulates throughout the game)
Barrel buster           Destroy 500 barrels (this accumulates throughout the game)
Big blast               Get 500 damage in one shot
Body count              Get 500 kills throughout the game
Bronze damage           Get 25 000 tatal damage throughout the game
Four bagger             Kill four worms in one shot
Gold damage             Get 100 00 damage throughout the game
Greedy worm             Collect 500 crates throughout the game
Hot foot                Dodge 500 mines throughout the game
Magic bullet            Kill three people with a shotgun in one turn
Rocketeer               Use 2000 jetpack fuel
Silver damage           Get 50 000 damage throughout the game
The beast within        Kill three people with one animal
Three bagger            Kill three worms in one shot
Weapon specialist       Get 8000 damage with a bazooka throughout the game


Unlockable hats

You can unlock various hats by completing certain parts of the story mode.
Unlockable              How to Unlock
Boggy the kid           Complete missions 11-15
Caveworm                Complete missions 21-25
Hard hat                Complete missions 1-5
Queen of sheeba         Complete missions 16-20
Royal knight            Complete missions 6-10


Unlockable maps

When you buy a map, you can use it multiplayer mode or online.
Unlockable              How to Unlock
Challenges maps         Defeat the team 17 times, again you will get one map per level
Story mode maps         You will unlock one map per level


Weapons

These weapons can be unlocked by buying the following items.
Unlockable              How to Unlock
Bubble Trouble          Buy the "darksider" weapon scheme
Holy hand grenade       Buy the "holy grail" weapon scheme
Icarus potion           Buy the "mega powers" weapon scheme
Inflatable scouser      Buy the "it's a mystery" weapon scheme


Easter Eggs
Carpet capers easter egg

To receive the first easter egg and 1000 coins do the following. Go to the "carpet capers" level on story mode. There is a tower with an enemy called "egg" on it. Parachute down to that tower and go through a hole at the bottom of it. There you will find a jewel, get it. A message will appear saying "you found an easter egg". Now finish the level (it doesn't matter if you win or lose). You now have the first easter egg and 1000 coins.


Destruct and Serve Easter Egg

In the Mission "Destruct and Serve" There is a Car that looks like the Delorean of Back to the Future. Blow it up with an explosive weapon to recieve the "88 MPH" Easter Egg and 1,000 Coins


Escape from tree rex easter egg

To get the second easter egg and 1000 coins do the following. Go to the "escape from tree rex" level on story mode. Jetpack down to a platform with a crate. Get the crate and receive two bazookas. Now shoot the mouth of the T rex (not the platform in his mouth). A message will appear saying "you found an easter egg". Now finish the level (it doesn't matter if you win or lose). You now have the second easter egg and 1000 coins.


Nice to siege you easter egg

To get the third easter egg and 1000 coins do the following. Go to the "nice to siege you" level on story mode. Go to where the proffesor is and go down the cliff. You should see an entrance. Go inside to find a worm dressed like a rabbit. A message will appear saying "you found an easter egg". Now finish the level (it doesn't matter if you win or lose). You now have the third easter egg and 1000 coins.


Tin can alley easter egg

To get the fourth easter egg and 1000 coins do the following. Go to the "tin can alley" level on story mode. Look around you. Behind you there is a toilet. Shoot it. A message will appear saying "you found an easter egg". Now finish the level (it doesn't matter if you win or lose). You now have the fourth easter egg and 1000 coins.