You have to shoot 3 Black Ops 1 DS games. The steps can be done in any order and with a non-pack-a-punched gun.

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3383284213

In the spawn area, behind the couch.

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3383283388

Purchase the first door for 5000 points. Go all the way, in between Jugg and the next door, it is underneath a file cabinet.

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3383283432

Buy the second and final door for 10,000 points. Look in the corner behind the curtains and under the surgical/operating table and the nearby window.

Gg.

Random Dude
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3383283649