Via Indiewire.com:
To say that George Lucas has tinkered with his original “Star Wars” trilogy since they were first released would be an understatement. As this extensive and slightly mind-boggling Wikipedia entry details, even as far back as 1977, when different film print versions of “Star Wars” were going to theaters, Lucas started making changes to his film. From there, his constant tweaking continued with each new home video release, from VHS to LaserDisc to DVD and more recently, to Blu-ray, where we catch up with this series of videos.

Marcelo Zuniga has put together a visual guide to all of the changes Lucas has made to the original “Star Wars” trilogy, from their initial theatrical release to the most recent Blu-ray edition that arrived in 2011. The snips-and-cuts additions range from adding rocks in a scene, to extensive CGI to, most controversially of all––Greedo shooting first. While fans continue to clamor for the (unlikely) home video release of the original theatrical cuts, you can see how the movies evolved over the years below.

Click below to read the full article and see the video comparisons.