Various Cheats :

Enter any of the following "Passwords" as a password:

DNSTHMN = Level Select
NSRLS = Weapons
MMRTL = Invincibility
MMLVSRM = Max Ammo
CNTN = Unlimited Continues
DNLVSHSF = Invisibility
THDTST = Test Info
LVNGLRG = Living Large
DRVLLVSMM = Mini Mode
TNSLDRS = Tin Soldier
BGGRN = Big Green One
GRNGRLRX = Vikki
PLSTRLVSVG = Plastro
SHRMNSLDR = Hail Mendheimicus

Level Passwords :
Attack - LNLGRMM
Spy Blue - TRGHTR
Bathroom - TDBWL
Riff Mission - MSTRMN
Forest - TLLTRS
Hoover Mission - SCRDCT
Thick Mission - STPDMN
Snow Mission - BLZZRD
Shrap Mission - SRFPNK
Fort Plastro - GNRLMN
Scorch Mission - HTTTRT
Showdown - ZBTSRL
Sandbox - HTKTTN
Kitchen - PTSPNS
Living Room - HXMSTR
The Way Home - VRCLN