If you are lucky enough to have a badge to attend Comic-Con (they sold out months ago), you can go to the Xbox booth at the San Diego Convention Center during Comic-Con from July 21-24. You will be able to play a newly revealed campaign from the upcoming sci-fi shooter Gears of War 4 at the booth. If you don't have a badge, but will still be in San Diego, don't fret. The free Nerd HQ event at the nearby New Children's Museum will also have playable demos of upcoming Xbox One and Windows 10 games, including Gears of War 4, Halo Wars 2, ReCore, Forza Horizon 4, Dead Rising 4, Titanfall Final Fantasy XV, Below, and Everspace.
Microsoft will also be holding panels at Comic-Con at the San Diego Convention Center, including Sea of Thieves and Gears of War 4 on July 21 and Halo Wars 2 on July 22. If you don't have a badge, there will be another Gears of War 4 panel on July 22 at Nerd HQ that you can attend for the price of $20, with the proceeds going to the Operation Smile charity.