Worms

Extra weapons:
Type baabaa at the weapons option screen. Exploding sheep, the banana bomb, and full motion with the ninja rope will be available during game play. Type aabaab at the weapons option screen to disable cheat mode.

Unlimited Sheep:
Type bobjob at the weapons options screen.

Rapid fire missiles:
Type aabaab while shooting a mini-gun.

Extra turn:
Type aabaab while firing a banana bomb.

Unlimited bazooka missiles:
Select a target with the Uzi, then hold [Shift] + [F1] and press [Space].

Level passwords:

ALIEN
ALPS
ARCTIC
BEACH
CANDY
DESERT
FOREST
GRAVEYARD
HADES
JUNK
MARS
MONEY
TROPICS
WARZONE

Hint: Mini-gun:
Hold [F3] + [F5] for five seconds then press [Space]. You will shoot a mini-gun. Note: This does not work all the time.
Information in this section was contributed by Bruce.

Hint: Fire bazooka missiles with the Uzi:
Select the Uzi. Press [F1] + [F3] + [Space]. The selected worm should fire missiles with his Uzi, obliterating a large part of the landscape and friend and foe alike. This requires some practice.
Information in this section was contributed by Laguna Loire.