Marsmission.lego.com

History
"marsmission.lego.com" was a site on "lego.com" for 3 to 4 years until the Mars Mission line was cut. The site was decked out with a media lounge featuring movies, games, product list, and fan model gallery. Sadly, the downloads and gallery are not useable. The CrystAlien Conflict game briefly reappeared a few months after the site's closing, thus reopening the the site, however it was then removed a few months later, officially closing the Mars Mission web presence for good.

Mars Mission Site
Click here to go to "marsmission.lego.com" using the WayBack machine. Credit for the idea goes to an anonymous contributor.

The WayBack Machine
The WayBack Machine and the internet archive are both the product of a non-profit movement to capture the internet and its history.
There are two ways you can get to the WayBack machine:

1. You can get to it indirectly; In your browser, search for 'WayBack Machine'. Click the link that says "Internet Archive: WayBack Machine."
2. Click the following link to go directly to the WayBack machine; https://archive.org/web/

Once you are there, you can type in the name of ANY website (for Mars Mission, type in http://marsmission.lego.com) in the search bar to see if there are available snapshots for the site. Click search.
You will get a calendar on your screen. A calendar? Click any year. For Mars Mission, you'll want to go with dates in 2008 for the best formatting, but really any marked date is worth a look. Don't go too far or Mars Mission won't be there.
Two in three times you'll get something that resembles the old site in its former glory!