Here is a map I worked on for Call of Duty-Ghosts. It was part of the materials released before the game was for sale. There were a few special clues in the map that if followed lead to some fun Easter eggs in game.

Some of the elements, like the dog stickers, were provided to me, so the map is not 100% my work.

Call of Duty - Recon Map-cod_reconmapfinal.jpg