You play as secret agent Sam Fisher as you try to avert a global nuclear catastophy. You will have to use stealth and cunning as you traverse hallways filled with alarms and heavily armed guards that may or may not pass you by (depending on how good your hiding spot is). The game pushes the DS graphically, runninng in full 3-D. The touch control eases menu navigation, weapon selection, and helps mimic actions once confined to button pressing (cut the alarms wire using touch control, ect.).