This challenge is very simple. With one character, complete every active combat quest in the module that is accessible to PCs (including all quests in all regions of the server). Take a screenshot with your character at the end of the quest demolishing the boss, or standing over its corpse.
If you are seriously close to completing this challenge in the eyes of the DMs, we will be willing to increase level limitations or whatever to allow you to take quests that you may otherwise be too high level for (although only if you are close!).
In the incredibly unlikely event that anyone completes this challenge, I will run them a Very Seriously Cool tailor-made adventuring DM quest for your character and whoever he wishes to bring along.