WELCOME TO CALL OF DUTY BLACKOPS TIPS N' SECRETS!!! ThunderGun in Campagain In the mission Numbers at the start of the mission after talking to clarke when enemys come into the room throw all of your grenades,2 on each side to blow up the "nova 6" container's.After blowing them up go over to the computers on the right side of the room.There you will find recorder and hold square/PS3 and x/xbox to get the black tape then go out the hatch in the celing and kill all enemys.When you get to the roof just jump over to the next building,when you land wait for "Clarke" and "Weaver" to move the fridge .When your in the room look to the left and you will see another recorder.Go over to the recorder hold square or x to put the tape in.When it is in you will here a beebing noise switch to the weapon you don't want to swap and sitch again you now have the ThunderGun.enjoy