Frequently asked questions

Yes for eligible individuals, studios, and educators under Epic Games license terms. You can download Unreal Engine through the Epic Games Launcher at no upfront engine fee. Commercial products may owe a royalty after published revenue thresholds. Always read the current Epic EULA before shipping.

Epic’s standard Unreal Engine license may require a royalty after a product exceeds published lifetime gross revenue thresholds. Exact percentages and carve-outs change over time and can differ for custom enterprise deals. Confirm numbers in the current Epic license text before budgeting. More context on trust and licensing.

No. Eligible users can access Unreal Engine source under Epic’s license. That model is source-available under Epic license terms, not OSI open-source. You do not get OSI rights such as unrestricted redistribution under an OSI-approved license.

Prefer the Epic Games Launcher with an authenticated Epic account. Avoid unsigned mirrors and random archive uploads. Start from our download page for version and storage facts, then install via the launcher. Treat launcher checksums and account login as the trust boundary.

Yes. Heuristic scanners sometimes quarantine cook workers, build tools, or editor binaries. Restore from quarantine, add scoped folder exclusions for engine and project paths, then verify the install in the launcher. Step-by-step: antivirus guide.

There is no single fixed installer size because the launcher downloads selected components. Estimates commonly place a minimal engine install around 30 to 40 GB, with fuller setups exceeding 100 GB. Keep additional free space for temporary downloads and Derived Data Cache. See disk space guide.

Yes. Many teams ship gameplay with Blueprints alone. C++ becomes useful for performance-critical systems, custom engine modules, and some plugin or packaging workflows. Packaging still requires host platform SDKs even for Blueprints-only projects.

Unreal Engine centers on C++ and Blueprints with strong high-end rendering and virtual production tooling. Unity centers on C# with broad multiplatform tooling. Licensing, learning curve, and rendering stacks differ; pick based on team skills and target fidelity rather than slogans. A short criteria table is on the home page.