Cheat mode:
After picking the Load Game option put in one of these passwords. Ignore the bad password warning.

Turbo Mode - GOOUTTAMYWAY
Turn Off AI - SCAREDSTIFF
Long Jumps - BIONICJUMPER
Slo Motion - IMTIREDTODAY
Creator Message - TTOPFSECRETT
Show FMV's - SEECOOLMOVIE

Mission Passwords:

02 Subpen Mission - ABEMJQLNVTPG
03 At Russian Embassy - OGLIESHVIRLL
04 KGB Warehouse - OQRFFSITJMNI
05 KGB Headquarters - EHNJHSURWJMP
06 Security Hallway - GDPSISJOWUAN
07 Underground Sewage Plant - GGHIHSJVWRML
08 Security Hallway - GQOFISKTLMAI
09 KGB Headquarters - IGCJMJMVMRBL
10 Russian Embassy - IQDSNJNTOMCI
11 IMF Headquarters - IJENMUNHONCJ
12 IMF Headquarters - IMQPNHNKOSCM
13 Infirmary - PBFROUOPPWDB
14 CIA Rooftop - PMGKPUPKQSDM
15 CIA Mainframe Computer - PJGNOUPHQNDJ
16 CIA Rooftop - KEJPPUPSRKEE
17 Waterloo Station - HDGGFPKQMOBC
18 Train - IGILGPMLMYBO
19 Train - HDGOFTKQMOBC
20 Train Roof - IGJDGTMLMYBO
21 Lundkvist Base - NGHSMGQTXMGI
22 Tunnel - MOEEOJGHVXJH
23 Mainland - MKEHTJSSVVJD
24 Gunboat - AFQMOJGPVTPG

Invisible walls
Activate the "Super Jumps" code and begin game play on the first mission. When the mission starts, get over the crates and jump until you get to the back of the fence. Jump over the river. You are now in an area where some of the walls are invisible.