Empire Market is great and most popular Onion Net Marketplace at the time. Being this popular it faces the problem of continuous Ddos attack witch leads prime Empire Market URL to be down, and alternative link as well. That means that empire marketplace have to make more and more URL and onion links and mirror. And the thing is that there is not much ways users can discover a right Empire Market mirrors.
So that's why Empire Marketplace decided to create an official website where their users can at any time find fresh URLs and onion mirrors, for quick enter to Empire Market. Here it is http://empiremarket-url.com make sure you using it every time you want to enter to darknet market empire market.