Army Men: Sarge's Heroes Codes -

All characters
Enter "BTTLN" as a password.

Mini mode
Enter "DRVLLVSMM" as a password.

Making of sequence
Enter "SFFRMV" as a password.

Test information
Enter "THDTST" as a password.

Level	Password
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 [Note]	VRCLN

Note: This password also unlocks all characters in multi-player mode.