Here are the cheat codes to be entered in the "secured line" box (key [ENTER]) during playing:

motherrussia - summon a M80 tank mofo!
coolihaveanewcar - summon a CIA armored van
coolimthepresident - summon a US president (so useless! ;)
swatatyourorders - summon a SWAT
ymca - summon a US cop
greenjelly - summon a UK cop
bringoutthedead - summon an ambulance
duckhunt - summon a flying duck
blackhawkdown - summon a SA12 anti-aircraft missile
yeepeekaye - drop a nuke on the cursor
keyholemaster - unlock map vision
fortknox - add $1000(useless if u use "Ineedalltechnos" cheat code)
ineedalltechnos - unlock all buildings & infinite money;note,the money bring down but never end
bigbrother - unlock camera mode (the camera key? ask TNT supersceners!)