I only know of a few like naming games after real games like Halo and your company name after a real one. Do you guys know of any others?
If you use the forum search function at the top right there are a few easter egg topics already. Perhaps check there?
You can try this link -CLICK
You can see the picture on the room to figure what game name to put. 2 poster will be at 2nd office and another 2 more at 3rd office(the one with better computer)