Enter the following cheats in the menu

ANCHOVYBAY:
Unlock Sloprano chapter

BEEFCURTAINS: 
Gives you Zombie villagers and the little uga buga men in WAR mode 

BEELZEBUBSBUM:
It's War chapter

BILLYMILLROUNDABOUT:
damn can't remember just type it in its helpful in WAR mode

BOVRILBULLETHOLE: 
You can shoot everything 

CHOCOLATESTARFISH:
Unlock The Heist chapter

CLAMPIRATE:
Unlock Bats Tower chapter

DRACULASTEABAGS:
Fifty lives 

DUTCHOVEN:
Gives you a frying pan in RACE mode 

EASTEREGGSRUS: 
Gives you NeoConker in WAR mode 

EASY:
Easy mode

EATBOX: 
Gives you Zombie villagers and the little uga buga men in WAR mode 

MONKEYSCHIN:
Unlocks Uga Buga chapter

PRINCEALBERT:
Unlock Barn Boys chapter

RUSTYSHERIFFSBADGE:
Gives you the Squirrell and Evil Teddiz leaders in WAR mode 

SPANIELSEARS:
Unlocks Spooky chapter

SPUNKJOCKEY: 
Gives you a matrix death scene 

VERYEASY:
Very easy mode :) 

WELDERSBENCH:
Unlock All chapters and scenes

WELLYTOP:
unlock Conker in race and war mode.

XFYHIJERPWAL IELWZS:
Debug mode

Submitted by Dark_kowlord at hotmail.com and an anonymous person