✨Initial video (v0.2) | ✍🏼Read the manual. | 💬 Discord support. | 🎁 Get the Core version on GitHub: a functional open-source variety that I recommend you try before buying the Pro version. | 👨‍💼 Contact for custom integration / implementation.

🔥Say goodbye to input lag and latency in Unreal Engine! Introducing Rollback Core (Pro), the ultimate deterministic GGPO-style rollback netcode framework built specifically for UE5.

Whether you're building a fast-paced fighting game, a platform brawler, or a tight co-op experience, standard server-client networking just doesn't cut it. Rollback Core flips the script: simulate locally, predict remote inputs, and seamlessly re-simulate history when the truth arrives late. The result? Zero perceived input lag for your players. ⚡️🎮

✨ Why Choose Rollback Core?

🔹 Auto State-Saving (No Code Required): Forget writing complex C++ serializers. Just check the standard SaveGame flag on any Blueprint variable, and we'll automatically handle snapshots, transforms, and velocities via reflection. 💾

📖 Custom UDP Transport: Highly-optimized netcode featuring per-frame input redundancy, reliable ACKs, and built-in latency/packet-loss simulation for effortless stress testing. 📡

💬 Deterministic Fixed-Step Logic: Decouple your visual framerate from your game logic! Runs a perfectly rigid, predictable simulation under the hood.⏱️

👀 Visual Frame Debugger: Spawn our intuitive debugger right into your world to scrub through frames, view prediction ghost trails, and analyze rollback markers in real-time. 👻

👇 Seamless Matchmaking: Full OnlineSubsystem support so your players can effortlessly advertise, query, and join sessions out-of-the-box. 🤝

👾 3 Playable Demos Included: Learn by doing! We've included a fully playable 2D Viking Duel (with hitboxes & blockstun), a Network Packet-loss stress test, and a Basic Prediction environment. ⚔️

🛡️ Guided Editor Wizard: Get set up in 5 minutes with the onboarding Wizard. It automatically fixes project settings and injects the necessary rollback components directly into your existing Pawn. 🪄

🚀 Ready to upgrade your netcode?

✦ Disclaimer: this plugin assumes a working knowledge of UE5 workflows, editor tooling, asset setup and so on. Custom integration, extension or modification may also require comfort reading and writing C++. If you are new to UE5 or plugin-based development, expect a learning curve. Before purchasing the Fab version, it is recommended that you explore the open-source GitHub version and the online manual first to understand the architecture, setup requirements, and integration style. This will help you determine whether the plugin fits your project and experience level.