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Screenshots:

Background:
In the not too distant future, an alien planetoid has entered our solar system. When scientists discover that it is rich in a new energy source called Transium, the biggest land rush in history is on! Four multinational corporations have turned their science outposts into mining colonies, and they are looking for a million recruits to stake land claims on this ultimate frontier.

Gameplay:
You are assigned mining rights to one of one million plots of land on the planet. This claim is yours to fortify, mine for wealth, and protect from the attacks of up to 999,999 of your closest friends. Band together and pillage the land claims of other colonists, or build elaborate defenses and mutual protection alliances with other players to protect your base. And watch your back, because the action in Project Visitor goes on 24 hours a day, seven days a week, even when you're not logged on. If you aren't careful, you might log on to find your base damaged or destroyed.