Cheat Codes:
Enter these codes on the password screen -
Code:                                 Effect:
HARDEST OF ALL         Extreme Difficulty
I WILL NOT DIE                Invincibility
REDUCE GRAVITY        Reduced Gravity
SAME CHARACTER      Play As Same Character In 2-Player Mode
GO SIGHTSEEING         No Enemies
MONSTER WHEELS     Monster Truck Tires
DEADLY MISSILE          Stronger Homing Missiles
WMNNWLHTSCUCLH  All Characters, Levels & The Alien
SEE ALL MOVIES          View All The Movies

Passwords:
Here are codes for every person's Quest mode, which have been gained after passing it with 'Objective Met' award -

Chassey Blue:
Mission 1 - AOGIKYFGQQTWGA
Mission 2 - YMBEJEOPDHYHZV
Mission 3 - RIPJNYEPGFPJAI
Mission 4 - HGFTDDNMUBXRLV

Slick Cycle:
Mission 1 - TNLCROHSQAZDMQ
Mission 2 - QDANNFHMSLBMWF
Mission 3 - FYLYRFKEAHGGAW
Mission 4 - OIRYEEBGDBNHBJ

Sheila:
Mission 1 - EDAOHIJIOUEDBA
Mission 2 - HSDNTZSGVOGCLP
Mission 3 - NTWZYUQSPXMHMB
Mission 4 - BXINCWNWGCQVJF

John Torgue:
Mission 1 - WSLZFBNQDTFDBF
Mission 2 - BXNJRYSXTYACKE
Mission 3 - IBXGFDQBSNISJQ
Mission 4 - ZCTEAFJVMNDJUT

Dave:
Mission 1 - PYQXPDUMJNBOUP
Mission 2 - OULIUZTJHPKWTD
Mission 3 - QYDJBUYBZTEUQC

Convoy:
Mission 1 - AIHJZNIFPZNFWA
Mission 2 - UKXCXCOAIGOKVH
Mission 3 - KHREIWYIZREYHK
Mission 4 - VSNKJVURSUNRWX

Loki:
Mission 1 - THLOHJWURONKLQ
Mission 2 - VIBWYIVGOPAUWX
Mission 3 - CEJMULWPCYYAVS
Mission 4 - PGGOVIUNUQEIVU

Houston 3:
Mission 1 - BDPTGXUBXOCCKE
Mission 2 - GCTPCXCCIWXVUJ
Mission 3 - NXJFNPZXRAAGMB
Mission 4 - DTQQSKTRYIHGEN

Boogie:
Mission 1 - FOJGCRHLWMUQZV
Mission 2 - DRFIQVOUYIHGEN
Mission 3 - WCHPZDGBCYEDBF
Mission 4 - JHAZRUUMTLUYBG

Beezwax:
Mission 1 - YUYFNKTAQGLNYW
Mission 2 - TXXKKGEWRONKLQ
Mission 3 - KHUSNNWJXORZHK
Mission 4 - UIBRJCCYSARVH

Molo:
Mission 1 - EDDNXIAPNTRDBA
Mission 2 - ITAHZJRMYTLSJQ
Mission 3 - NPRJUYRYRAAGMB
Mission 4 - AKFQPUISMWAHWA

Sid Burn:
Mission 1 - LPHPMMDNMPEMVB
Mission 2 - PEONQGUNUQEIVU
Mission 3 - XOKIXDXBKQRFOJ
Mission 4 - OYROHGBDNLSJSI