Unreal Engine

Unreal Engine 4.21

Unreal Engine is now free. Free for game development. Free for Virtual Reality. Free for education. Free for architecture. Free for film.

Download options:
Freeware
Windows/macOS
37.5 MB
70,330
4.5 185 votes

What is Unreal Engine 4?

Unreal Engine 4 is a complete suite of game development tools made by game developers, for game developers. From 2D mobile games to console blockbusters and VR, Unreal Engine 4 gives you everything you need to start, ship, grow and stand out from the crowd.

Mobile

Designed for mobile, now and in the future. From simple 2D games to stunning high-end visuals, Unreal Engine 4 gives you the power to develop your game and seamlessly deploy to iOS and Android devices.

Blueprints

Blueprint visual scripting enables you to rapidly prototype and build complete games, simulations and visualizations without the need for programming. Blueprint tools and a visual debugger are included with Unreal Engine 4.

Tools

The Unreal Editor is a fully integrated suite of tools for building every aspect of your project. Advanced features include physically-based rendering, UI, level building, animation, visual effects, physics, networking, and asset management.

New: Volumetric Fog

Create incredible ambience and mood in your environments using the new Volumetric Fog! Varying densities are supported so you can simulate clouds of dust or smoke flowing through light shafts, and any number of lights can affect the Volumetric Fog.

New: Image-Based (FFT) Convolution for Bloom

Create physically-realistic bloom post-process effects using the new image-based (FFT) convolution feature! Unreal Engine 4.16 ships with a FFT Bloom that empowers artists to use custom bloom kernel shapes, with total control over the intensity in order to match the results they imagine.

New: Release Games on Nintendo Switch

Registered developers can now build and release games for the Nintendo Switch! Unreal Engine 4's production-ready Nintendo Switch support is certification compliant, enables networked multiplayer, and provides access to multiple rendering pipelines - deferred, mobile forward, and clustered forward - to enable you to ship virtually any type of game for Nintendo Switch.

Source Code

Every Unreal Engine 4 developer has access to the complete C++ engine and editor source code. Having full source code gives you the power to customize your game, and makes it easier to debug and ship. Join Epic Games and the Unreal Engine community in updating and extending more than three million lines of code available on GitHub.

Virtual Reality

Visual fidelity combines with high performance to create engaging, immersive VR experiences in UE4. Our rendering pipeline gets you to 90 Hz stereo framerate at high resolutions with no code changes required, while scalable tools mean you can develop everything from simple scenes to complex cinematic environments. All with an iteration speed that makes your creative process easier.

Marketplace

Accelerate your development with sample games and scenes, art and audio, Blueprint logic, and even C++ code. Buy content to add to your project, or create and sell your own.

One engine, one workflow

With Unreal Engine 4, you can learn one engine and one workflow to meet all of your needs now and in the future. From mobile projects to super high-end console and PC games, Unreal Engine is in use by indies and professionals around the world.

Own the high end

Push your visuals to the limit on PC, consoles, and VR with custom lighting, shading, VFX and cinematic systems. Create beautiful visuals for architectural visualizations, simulations, digital films, and more.

Everything you need to get started

The Marketplace provides a wealth of production-ready game content, asset packs, documentation, sample projects, tutorials, and demos. Get up to speed rapidly with high-quality, UE4-ready items suitable for a wide range of art styles and game genres.

Niagara Platform Support and Usability Improvements

In our continuing effort to provide industry-leading effects tools, Niagara has received an expanded feature set, substantial quality of life improvements, and Niagara effects are now supported on Nintendo Switch.

GPU-Only Texture Sampling in Niagara

You can now sample a 2D texture or a pseudo-volume 2D texture in your particle scripts! Create amazing effects such as rendering the scene's depth, color and normal information using a Scene Capture Actor and use that to reconstruct the environment within a Niagara particle system with the particles' potential and kinetic energy visualized as emissive light.

What's New:

Unreal Engine 4.21 continues our relentless pursuit of greater efficiency, performance, and stability for every project on any platform. We made it easier to work smarter and create faster because we want your imagination to be the only limit when using our tools. And we battle-tested the engine on every platform until it met our developers' high standards so your project will shine once it is ready for the masses.

We are always looking for ways to streamline everyday tasks so developers can focus on creating meaningful, exciting, and engaging experiences. Our industry-leading Niagara effects toolset is now even more powerful and easier to use, enabling you to dream up the next generation of real-time visual effects. You can build multiplayer experiences on a scale not previously possible using the now production-ready Replication Graph functionality. Iterate faster thanks to optimizations with up to a 60% speed increase when cooking content, run automated tests to find issues using the new Gauntlet automation framework, and speed up your day-to-day workflows with usability improvements to the Animation system, Blueprint Visual Scripting, Sequencer, and more.

We strive to make it possible for your creations to be enjoyed as you intended by everyone, everywhere regardless of the form factor they choose. Building on the previous release, we have added even more optimizations developed for Fortnite on Android and iOS to further improve the process for developing for mobile devices. Available in Early Access, Pixel Streaming opens a whole new avenue to deploy apps in a web browser with no barrier to entry and no compromise on rendering quality. We have also improved support for Linux as well as augmented, virtual, and mixed reality devices.

In addition to all of the updates from Epic, this release includes 121 improvements submitted by the incredible community of Unreal Engine developers on GitHub!

Complete release notes here.

Module Additions and Improvements

  • Generate and receive death events
  • Now factoring mass into multiple modules
  • New SampleSkeletalMeshSkeleton, SampleSkeletalMeshSurface, SkeletalMeshSkeletonLocation and SkeletalMeshSurfaceLocation modules to complement enhancements to the Skeletal Mesh Data Interface
  • New AddVelocityInCone module
  • New Force modules: FindKineticAndPotentialEnergy, GravityForce, SpringForce and multiple usability tweaks to other forces
  • New KillParticlesInVolume module
  • New SpriteRotatationRate module
  • New RecreateCameraProjection module for using render targets and camera transforms to turn scene captures into deformable particle systems
  • New modules for sampling textures: SamplePseudoVolumeTexture, SampleTexture, SubUV_TextureSample, and WorldAlignedTextureSample
  • New utility modules for temporal interpolation and frame counters
  • Many new dynamic inputs and functions

Installation:

How to install Unreal Engine in Windows:

  1. Click the Download button to get our installer.
  2. Once the download is complete, Run the installer.
  3. Click the Install button when the Epic Games Launcher Setup dialog box appears.
  4. Sign into the Epic Launcher.
  5. Click the Unreal Engine tab inside the Epic Games Launcher Loading Screen.
  6. Click the Install Engine button to download and install the latest version of Unreal Engine.
  7. Read our Unreal Engine End User License Agreement (EULA) prior to clicking the Accept button.
  8. Depending on your system specifications, downloading and installing Unreal Engine will take between 10-40 minutes.

How to install Unreal Engine in macOS:

  1. Click the Download button to get our installer.
  2. Double-click the EpicGamesLauncher.dmg icon in Finder to open a new Finder Window.
  3. Drag the Epic Games Launcher icon into the Applications folder.
  4. Sign into the Epic Launcher.
  5. Click the Unreal Engine tab inside the Epic Games Launcher Loading Screen.
  6. Click the Install Engine button to download and install the latest version of Unreal Engine.
  7. Read our Unreal Engine End User License Agreement (EULA) prior to clicking the Accept button.
  8. Depending on your system specifications, downloading and installing Unreal Engine will take between 10-40 minutes.