The banner should somehow show that it is a dungeon game. You can show some fantasy characters on the banner, but make them in a cartoony style, like the characters from Dragons Lair or Munchkin. I will attach pictures of the main characters soon. It should be fun to look at the banners and people have to recognize typical dungeon elements. Maybe some brutality would also do good. I will attach the letter "Zans Mountain" to this briefing. The letter must be shown on all banners.
Sizes needed: 125x125, 300x250 180x150 270x100 200x90
Also it must be made clear, that it is for free (either by Free or Lite) somewhere on the banner.
Here a short description of the main characters:
Roland is a knight of the realms and he is quite proud of it. He is a hands-on knight and he has successfully fought many battles against the foes of the Realms and returned from really dangerous quests. He has never really cared about women and because he is already in his thirties, his father decided to send him on a quest to rescue a beautiful princess and slay a mighty old dragon and some dungeon inhabitants along the way.
Micks is a wizard apprentice at a court of a noble, who has sent one of his knights to rescue a beautiful princess. Since Micks feels, that this Knight is a fool and much too old to marry the princess, he decides to go onto a rescue mission on his own.