Microsoft is taking cues from platform-agnostic juggernauts like Roblox and Fortnite to help guide its Activision-accelerated Xbox gaming business.

Popular world-building game for kids 'Roblox' is coming to Xbox One in December. It's bringing 20 of its best user-made games along. Best of all: it's all free.

Microsoft announced a new Xbox One S bundle featuring the free-to-play MMO Roblox and contains other exclusive content for the game.