Ah, someone's pulled the goblin's beard out of the server
In RPG terms ARGs are maybe a form of metagaming. Kind of like community wide games? Here's a very short description.
Alternate Reality Games (ARGs) are shared social games that use digital media and social networking to involve players in collaborative plot development and problem solving.
Yeah, a bit Blue Peter, prepared earlier for a post.
They're used a lot as promotional events for things like Halo and also to encourage all kinds of community activities.
Until recently most were technology-centric, tied to specific locations, puzzle-heavy and one off.
Renegade is more about having a laugh while playing RPGs, not specific to any location, group or tech requirements - and as persistent as any group of RPG players want it to be. It's not aimed at videogamers or anything else other than tabletop RPG players and possible new recruits.
The other obvious difference with most ARGs is a split between putting Easter Egg extra content on the site/ running a few activities on the site and playing the game as a group at home/ out there. An ARG usually combines the two but Renegade keeps them separate, so after one visit for the downloads there's no need to go back. This hopes to keep it player directed/ choice and does keep it cost free.
A better explanation will be to get the content out. Time to get back to Illustrator.