Halo Online is a free-to-play game which will launch this spring in Russia, and is in development with Saber Interactive.

Halo Online Announcement Trailer ~ Russia Only Watch on YouTube

According the reveal event attended by IGN Russia, the game was designed to run well on lower-end PCs and runs on a modified Halo 3 engine.

The game is set on a secret UNSC space station called "Anvil" where Spartans train and test technology. There isn't a campaign mode, but it takes place after the events of Halo 3 and supports 4-16 players matches.

The game will be published and operated by Innova Systems.

There are no plans to bring Halo Online to the Xbox One. A closed beta for Halo Online is coming soon.

An FAQ on Halo Waypoint states that should the focus shift outside of Russia, it would "have to go through region-specific changes to address player expectations."

Still, there are no such plans to expand release regions at this time.

Via IGN.