EA‘s Phenomic has announced that its massively multiplayer, browser based free-to-play strategy game, Command & Conquer Tiberium Alliances, is now in open beta.

You can sign up right now over here.

Command & Conquer Tiberium Alliances is the first cross-platform, free-to-play MMO strategy game. It is set in the Third Tiberium War era, if that means anything to you, and will feature some of the aerial units seen in Command & Conquer 4: Tiberian Twilight.

The game has been running in closed beta since December 2011, but as of this week EA has opened it to the public and lifted the NDA policy.

Not much is known about the game’s storyline, although Phenomic considers Tiberium Alliances a game where players can create their own story by forming their own alliances and fighting others.