Paul said to look outside of video games to discover this one. He also brought back up the previous hint pictures of Tron, James Bond and a Martial Artist.
Tron = The futuristic setting and advanced technology like Deus Ex
James Bond = Columbia Pictures, who're owned by Sony and are also apart of the production of a Deus Ex movie adaptation in the future. Both 007 and Adam also use gadgets.
Martial Artist = Adam Jensen is a CQC master
Also, picture #3 hints towards the American flag with the whole 13 large bullets/50 small bullets (13 stripes 50 stars). Deus Ex's main city is set in America and the Columbia Pictures logo is pretty much the Statue of Liberty.
As for picture #4 and it's La-Li-Lu-Le-Lo = Patriots thing. In Deus Ex there were the Majestic 12, who were pretty much the Patriots. They work behind the scenes controlling everything, and manipulate people through nanoaugmentation (nanmachines anyone?).