Microsoft announced Halo Infinite at its E3 2018 press conference.
The brief bit of trailer footage we saw showed off Spartans on a primal, unspoilt planet. It also showed a few seconds of series protagonist Master Chief—and teased him taking off his helmet.
Halo Infinite is powered by the Slipspace engine, and its story is centered on Master Chief on aa mission to save humanity. We'll have more info as it becomes available. In the meantime, hop over to our E3 2018 guide for everything you need to know about the show.