Here are links that you will need to start your ARGs (in no particular order):

• ARGN
  This is a starting point for ARGs. Post your ARG here.
• Wikipedia
• Reddit
• YouTube
• Mental Floss
• Innovative Learning
• Unfiction
  This is also a starting point for ARGs. There is a link to post ARGs to ARGN.
• eLearning
• Atlas Obscura Article
• Chronicle of Higher Education
• Ayogo Blog
• CNET Article
• Hidden Peanuts
• Despoiler
  A sister-site of unFiction. It hasn’t been active for awhile. Good links though.
• U of Chicago Orientation
  An example of a an ARG used to encourage incoming students to develop collaboration, leadership, inclusivity, digital media, and twenty-first century literacies.
• Learn Tech Lib (pay site)
• IEEE Site (pay site)
• Semantics Scholar Presentation

This tends to be more scholarly, but I include it because it shows how ARGs can be used besides publicizing movies.

Here is a list of lists of ARGs (not comprehensive):

• Wikipedia
• Reddit
• ARGN
• ARG World

*This in no way should be considered an exhaustive list.