I actually hadn't heard of the original until I purchased it off GOG.com and found it to be an enjoyable adventure title. I've since found that the developers have remained pretty loyal to the fans by upgrading the original to run on modern systems (even before the GOG release) and maintaining a webcomic that is still active. I wasn't sure if I would find any fans here, but I just thought I would pass along that they started a kickstarter campaign (or restarted, they had another one last year that didn't pan out). http://inherittheearth2.com/
Either way, the original is worth a look.