"NO FIGHTING IN THE WAR ROOM"
Reach the control room and abort the nukes.
Intel #29: Upon exiting the flooded restrooms and entering the red lit hallway, turn left. Keep going, past the well lit locker rooms, until you reach the fourth door on your left. Inside the darkened conference room, on the far end of the long table, is the laptop. You may need Night Vision to see it.
Intel #30: On the upper left landing of the mission control room is a conference room with a smaller version of the blue and green world map. The thirtieth and final intelligence item should be pretty easy to spot.
Congratulations - you're done! To enable all of the cheats you've just unlocked, press Start during a single player game, choose Options and then choose Cheats. Arcade Mode is available from the front menu.