If you are interested in participating in the Closed Beta test, you can head over The Mummy Online homepage and sing up there. If you are selected to be a part of the test, you will receive an email with instructions and a code!
The Mummy Online is a free-to-play, browser-based MMORPG which takes you into the universe of the blockbuster movie series. Choose a side and uncover the mysteries of ancient Egypt as you explore tombs!
Source: Game homepage