Impostors Among Fortnite - Turning Fortnite Into a Social Experience

Explore the technical foundations and design principles behind creating Fortnite's highly successful 'Impostors' social game mode in this 41-minute conference talk from Unreal Fest Stockholm 2025. Dive deep into the construction of flexible gameplay frameworks using Blueprints and C++ to build immersive multiplayer experiences that effectively balance gameplay mechanics, communication systems, and social interaction. Examine the game's sophisticated state machine architecture, quick chat systems, and matchmaking infrastructure through detailed code snippets and recorded demonstrations that reveal the underlying structures powering Fortnite's Impostors mode. Learn essential techniques for handling cross-platform input and communications, optimizing performance for social gameplay, and addressing critical challenges including anti-cheat implementation and game balance considerations. Discover practical workflows within Unreal Engine and UEFN (Unreal Editor for Fortnite) through comprehensive technical demonstrations and real-world examples. Gain valuable insights into the tools, techniques, and architectural decisions required to successfully build and scale engaging social gameplay experiences across multiple platforms and game projects.