Cheat mode:
1) On keypad Press Enter to open the console window. 
2) Now enter one of the following codes to activate the corresponding 
   cheat function
NOTE: Press Esc to close the console window
 
 
Result:                                 Code: 
Achieve objectives one at a time        cisco  
All inventory items                     refill  
Change your kit to specified file kit     
Chicken grenades                        chickenrun  
Disable constant shaky screen           rumbleoff  
Enable constant shaky screen            rumbleon  
Exit game                               quit 
Faster movement                         run  
God mode                                superman 
Hide corpse names                       hidecorpse  
Invisibility                            shadow  
Lose current mission                    autolose  
Mark location on map for teleport       mark  
Mark location on map for teleport       mark2  
Paintball mode                          extremepaintball  
Report current location                 loc  
Screen shakes                           boom  
Set gamma; default is 0.5 setgama       <0.0-1.0>  
Show object names                       names  
Show texture properties for objects     showtextureprops  
Squirrel launcher                       squirrelkite  
Suicide                                 god 
Take over enemy bases                   rock  
Team God mode                           teamsuperman  
Team invisibility                       teamshadow  
Teleport                                teleport 
Teleport to preset locations            spawn  
Toggle actor stats                      toggleshowactorstats  
Toggle AI                               toggleai  
Toggle display of tracers               tracers  
Toggle effect stats                     toggleshoweffectsstats  
Toggle framerate display                toggleshowframerate  
Toggle freezing trees                   togglemovetrees  
Toggle interface stats                  toggleshowinterfacestats  
Toggle level stats                      toggleshowlevelstats  
Toggle performance counters             toggleshowperfcounters  
Toggle system memory stats              toggleshowsystemmemorystats  
Toggle texture memory stats             toggleshowtexturememorystats  
Toggle total stats                      toggleshowtotalstats  
Toggle user interface                   toggleui  
Unlimited ammunition                    ammo  
Unlock Hero characters                  unlockheros  
View debug counters                     perf  
Win current mission                     autowin