Hints:

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

Cool As Ice level:
     The  ice  mission near the start is easier than it looks. Collect
as  many  crates as possible without using any utilities, then use the
jet pack to get up to the next section near the guard. Collect all the
crates  there  and  stand  on  the  polar bear's head. Point the flame
thrower  at a spot just to the left of the guard, and fire. You should
get through the barrier protecting him, and the flames should send him
into the water.

     Strap   on   your  jetpack  and  get  to  the  flamethrower.  The
flamethrower is the most important item on this level. Use it to shoot
at  your opponents. If it does not immediately kill them, shoot a fire
barrel to finish them off.

Super Sheep Racing:
     If  you have collected a crate at the very left of the level, and
the  next  crate  appears  at  the  very  right, deliberately crash or
detonate  your  current  sheep  and  set off a new one. This will save
time.

Desperation attack:
     If  you  are  almost  dead and a lot of worms are nearby, use the
Banana Bomb to blow them all up.

Cheat mode:
     Complete  one  of the following goals to unlock the corresponding
feature, which may be enabled at the weapons or game options screens.

Worms bleed when shot   Earn gold medal in Basic Training mode. 
Aqua sheep              Earn gold medal in Super Sheep Racing training mode.
Longbow power-up        Earn gold medal in Euthanasia training mode. 
Shotgun power-up        Earn gold medal in Rifle Range training mode. 
Grenade power-up        Earn gold medal in Artillery Range training mode. 
All weapon crates 
have sheep              Earn gold medal in Crazy Crates training mode.
Invincibility           Earn an Elite rank in Deathmatch mode. 
Laser sight             Complete mission 4. 
Jetpack                 Complete mission 8. 
Fast walk               Complete mission 13. 
Invisibility 
in multi-player games   Complete mission 16. 
Low gravity             Complete mission 20. 
Indestructible 
landscape               Complete mission 25. 
Super Banana 
Bomb power-up           Complete mission 33. 
Full Wormage 
game options            Gold medal and Elite rank in all .