Atomega is a new IP just announced today by Ubisoft. The game is a new online multiplayer first-person shooter. Interestingly, despite just being announced today, the game will be released on September 19 via Steam. It's coming from Ubisoft Reflections, who have had their hand in a number of titles over the years such as Grow Home, Watch Dogs, Ghost Recon Wildlands, and the Driver games.
Atomega takes place at the very end of time where reality is rapidly dissolving. All that exists are Exoforms, super advanced post-biological lifeforms, masters of matter, energy and the last distant relative to man and machine. As the laws of physics slowly repeal, the Exoforms fight for fun and dominance, replaying the final moments of the universe in an arena at the edge of destruction.

The player must acquire mass, by peacefully collecting it or via firefights, to evolve his Exoform from the nimble Atom to the godlike Omega. Competing for mass, players engage in a frantic battle for supremacy through intense 10-minute rounds, gathering up to eight players. Acquiring mass also grants points and the player with the most points at the end of the round wins. It is a relentlessly competitive experience, an easy to pick-up but hard to master game, with a light-hearted tone echoing the personality of its small development team.

As mentioned, you'll be able to play Atomega in a little over a week.