COGG is a text-based role-playing game inhabited by characters and factions who often have competing interests. The game takes place primarily in the Lost Lands, a region that was ravaged by a deadly plague over a hundred years ago which nearly wiped out humanity. Players are invited to create a character and discover themselves in the Lost Lands, interacting with the remaining inhabitants and exploring the ruins left behind by the dead.

Many have labored, fought, and died over the past hundred years to secure some semblance of security and prosperity in these ruined lands, and while things are arguably better now than they have been in quite some time, the struggle continues. People from all walks of life are necessary to maintain these ultimately fragile societies - farmers and ranchers, hunters and foragers, loggers and miners, craftsmen, surgeons, scholars, warriors, scouts, bounty hunters - all are important cogs in the intricate clockwork that keeps these societies running and the Lost Lands from collapsing back into chaos.