Halo 4

I only literally just found out about this game! This game is meant to be the start of a new trilogy, called 'the reclaimer trilogy'. It's set a couple of years a little bit after Halo 3, and Master chief is the main protagonist again.
The Masterchief and Cortana drift aboard the wreckage of the UNSC frigate: forward unto dawn. and then  find themselves upon a mysterious planet, which was seen upon the end of the legendary difficulty on Halo 3. It has been suggested that changes to Cortanas exposure and her lifespan could make her become rampant.
This game will move away from the traditional first person shooter and focus more on "exploration and mystery".
To conclude, this game looks like its going to be pretty good. First of all, it's Halo. so that automatically makes it amazing. also, it looks like its going to have a pretty good storyline because from what has been said, "Halo 5 will have a darker storyline before it is resolved in Halo 6". So, looks like we're in for a great trilogy, all over again.