How to use Cemu, the Wii U emulator, step by step

If you want to get the most out of Wii U games on your PC, Cemu is currently the go-to emulator . It allows you to enjoy titles like Mario Kart 8, Bayonetta 2, and The Legend of Zelda: Breath of the Wild with better performance and graphics than on the console itself, provided you have a capable computer. However, it's not a plug-and-play program: it requires proper system setup and following a few steps carefully.

Throughout this guide, you'll learn how to use Cemu step by step : from requirements and installation to controller configuration, legally downloading backups, Vulkan optimization, and using graphics packages, shaders, and game profiles. Everything is explained in clear, accessible, and straightforward language so you can have your Wii U games running in no time.

What is Cemu and why is it worth using?

Cemu was created in 2015 by a developer known as Exzap, who released the first versions on the GBATemp forums . At that time, it was presented as an experimental Wii U emulator capable of running some commercial games with good high-definition visual quality, although with significant performance limitations.

Since then, the project has progressed at a breakneck pace: the developers promised frequent updates and delivered , polishing bugs, improving compatibility, and increasing FPS in a good number of titles. Today, it's considered one of the best console emulators for PC, especially considering it's a relatively recent machine.

In earlier versions of the emulator, such as 1.6.4B, it was reported that around 3% of the Wii U catalog could be played without noticeable audio or video glitches (approximately 11 games), while about 16% was fully playable with minor glitches that didn't ruin the experience, totaling around 64 commercial titles. These included heavy hitters like New Super Mario Bros. U, New Super Luigi U, Super Mario Maker, Bayonetta 1 and 2, Mario Kart 8, Star Fox Zero, Xenoblade Chronicles X, Super Mario 3D World, Pikmin 3, Yoshi's Woolly World, Splatoon, NES Remix, Mass Effect 3, The Legend of Zelda: Twilight Princess HD, The Wind Waker HD, and Captain Toad, among others.

Although compatibility has improved significantly over time , it's important to remember that Cemu is still considered experimental software . This means that issues such as audio dropouts, videos that won't play, FPS drops, unexpected crashes, and graphical and texture errors may occur. Nevertheless, with suitable hardware, it's possible to achieve over 30 FPS in many games and enjoy a fairly solid gaming experience.

Reasons to use Cemu versus a physical Wii U

You might wonder why you're bothering with an emulator when you can play on the original console. The reality is that the Wii U has been discontinued for years and it's becoming increasingly difficult to find a new one , so many people's only option is the second-hand market, with all that entails in terms of condition, warranty, and price.

Furthermore, one of Cemu's biggest draws is its ability to significantly improve the graphics quality of games . While The Legend of Zelda: Breath of the Wild runs at 720p and 30 FPS on the Wii U, on PC with Cemu it can reach 4K and 60 FPS if you have a powerful machine, even with texture mods and graphics packs that further enhance the visuals.

Another obvious advantage is that you don't need to make room for another physical console in your living room or bedroom . If you already have a decent PC, simply install the emulator and manage everything from there, without any additional cables or devices to maintain.

Finally, emulators offer a lot of freedom when choosing your control system . On Wii U, you're limited to the official controllers and a few compatible ones, while with Cemu you can play with a keyboard, mouse, Xbox controllers , PlayStation controllers , generic gamepads… whatever you have on hand, as long as you can map the buttons correctly in the emulator's settings.

Legality: what is legal and what is not when using Cemu

The legal aspect raises many questions, but let's clarify: using emulators like Cemu is legal . They are independent software programs that do not include proprietary Nintendo code and, therefore, can be distributed without problems from their official websites.

The problem arises with ROMs or backups of games: downloading or using games you haven't purchased is what can infringe copyright . The general idea is that you should back up your original games yourself using your console and then load those backups into the emulator.

To legitimately extract the contents of your Wii U discs, there's software like ddd Title Dumper, which runs as homebrew on a modified console . This allows you to create your own backups in WUD format (disc images) or in RPX/RPL format with a folder and file structure, both formats recognized by Cemu.

While it's tempting to search online, downloading games from unofficial sources is entirely at your own risk . For legal and ethical reasons, it's recommended to use an emulator only with backups of games you already own physically.

Minimum and recommended requirements for using Cemu

Before you start installing anything, it's a good idea to check that your PC meets the requirements. You can find Cemu's official requirements on their website , but we can summarize them clearly to give you an idea of ​​what you need.

Regarding the operating system, Windows 7 64-bit or later is required . Cemu does not run natively on 32-bit systems or other platforms. If you're still using an older version of Windows , you'll need to upgrade.

In terms of graphics, Cemu requires OpenGL 4.1 compatibility as a minimum , and will support up to version 4.6 if available. The emulator does not use DirectX, so OpenGL compatibility is crucial for games to render correctly.

Regarding memory, at least 4 GB of RAM is needed , although it is much more sensible to have 8 GB or more if you want to move around smoothly, especially when combining emulator, browser, background applications and other programs.

In terms of graphics cards, Cemu works well with AMD and NVIDIA GPUs with updated drivers . Integrated Intel HD graphics are not officially supported and often cause visual or performance issues. The most stable tests were performed with cards like the GTX 970, GTX 1080, and equivalents, but it's also possible to run some titles with graphics cards that have 2 GB of VRAM, albeit with certain limitations.

There's no specific CPU model required, but multi-core processors with good multitasking performance tend to deliver better results . In real-world tests, chips like the FX-8350 or the Intel i7-6700K have been used with very good results, although nowadays virtually any modern mid-range or higher CPU can handle multiple games smoothly.

Don't forget the complementary software components: you need to have the Microsoft Visual C++ 2017 x64 package (vc_redist.x64.exe) installed to ensure that the emulator starts without missing library errors.

Regarding controllers, Cemu emulates the Wii U GamePad (DRC), the Pro Controller, the Classic Controller, and Wiimotes , and also supports keyboard and mouse. The touchpad of the tablet controller is controlled with the left mouse button, and the gyroscope is simulated with the right button, although this function still has limitations.

Download Cemu and choose the correct installation folder

To begin, the first step is to download the latest version of Cemu from its official website . You will receive a compressed file in ZIP format containing the executable and all the necessary files.

Once you have it, extract the contents of the ZIP file, but avoid extracting it to folders that require administrator privileges, such as "Program Files ." The easiest and safest way is to create a folder in your user directory, for example in Documents or on the Desktop, called something like "Cemu" or "WiiU_Emu," and place all the files there.

Many users also recommend centralizing everything related to Cemu—emulator, games, DLC, and updates—in the same area of ​​your hard drive . For example, you could have a "Cemu" folder in Documents, and within it, other folders like "mlc01," "wiiu_games," or "cemuGames" to keep everything organized.

Configure Cemu compatibility on Windows

Before opening the emulator for the first time, it's a good idea to adjust some Windows compatibility settings to avoid full-screen and scaling issues. These settings help prevent errors on different versions of Windows and at different resolutions.

Right-click on the cemu.exe file and select Properties; then go to the Compatibility tab . There you can enable the "Disable fullscreen optimizations" option, which often reduces problems with fullscreen windows and resolution changes.

Next, click on “Change high DPI settings .” In that window , select “Use these settings to correct scaling issues for this program instead of the one in the settings .” Right below, also enable “Override high DPI scaling behavior” and make sure the scaling dropdown says “Application.” Apply the changes and accept all the windows.

While not all computers need these settings, leaving these options enabled greatly reduces the likelihood of encountering unusual window size errors, blurriness, or problems entering and exiting full-screen mode . If they do cause problems in your specific case, you can always disable them later.

Initial Cemu setup: folders and graphics packages

With the program ready, open it for the first time by running cemu.exe from the folder where you extracted it . The first time it starts, it will ask you to configure some internal paths.

The first step is to create a folder called “mlc01” in a safe location . This is where Cemu will store internal data, save files, updates, and other virtual console files. You can create it within the Cemu folder itself, or, if you prefer a more organized system, in Documents within a subfolder of the emulator.

If the wizard asks for the "game path," you can leave that field blank initially to have more control over where you add the games later. You can always configure scan paths later from the emulator's options.

In this first run, you'll also see the option to "Download community graphics packs ." It's essential that you use this, because these packs include resolution improvements, visual bug fixes, performance tweaks, and even some mods. Click the corresponding button, let them download, and then click Next when the process is complete.

Configure controls and controller types

With the base now assembled, it's time to configure the controls. Within Cemu, go to the Options menu and select Input settings . From there you can configure different profiles and controls.

At the top, you'll see the "Emulated Controller" section. At least one of your profiles must be set to Wii U GamePad , as many games require it to access menus or interface elements. If you're only going to use one controller, choose "Wii U GamePad" as the emulated controller type.

In the "Controller" section, press the button with the + symbol and select "SDLController" as the API (it's usually the most compatible). Then, choose the physical controller connected to your PC from the list. Once selected, map each button and stick according to your preference.

Once you have it set up, you can save the profile with any name you want , for example "Xbox GamePad Controller" or "DualShock Pro", so you don't have to repeat the mapping every time.

If you plan to use multiple controllers (for example, for co-op play), make sure they are all connected during setup . Create a profile for each one and, under "Emulated Controller," decide whether the second controller will also be a GamePad or a Pro Controller. Many users have found that, in games like Mario Kart 8, it's best to configure all additional controllers as Wii U Pro Controllers to avoid local co-op issues.

USB Helper, downloads and game structure

One of the best-known tools associated with Cemu was USB Helper, a program that allowed users to manage and download games, updates, and DLC for use in the emulator. While its status and availability may change over time, it's worth explaining how it worked because many guides still mention it.

After downloading the installer (USBHelperInstaller.exe) from its original source, run it and follow the standard installation wizard: click Next, accept the license agreement, leave the default options, and click Install . Once the process is complete, click Finish.

On the first boot , USB Helper displayed a country selection screen and EULA: the agreement was accepted and the United States was chosen as the region , even if one resided in Europe or other areas, since it was the region that worked best with the tool.

Next, you would choose the folder where the downloaded games would be saved . Many people create, for example, a folder in Documents called “wiiu_games” to keep it separate from the rest. Both the downloaded files and the data ready to be unpacked were stored in that location.

To allow the program to access the store's content, a key source was added by entering the address "titlekeys.ovh" in the corresponding field as the title key repository . Once the initial setup was complete, USB Helper downloaded the necessary data and left the system ready to search for games.

The usual procedure involved searching for a title in the top bar, clicking on its icon, and then clicking the Add button . When the game was in the queue, the download button at the bottom of the window, usually highlighted in green, would become active. If the title had DLC or updates, the program would ask if you wanted to download them as well: it was recommended to accept to get the most complete and up-to-date version.

Once the downloads were complete, in the list on the left, within the "Downloaded" section, you could right-click on each game and choose the "Unpack" option . Then you would select a destination folder, for example, a subfolder within "wiiu_games" called "cemuGames", where the unpacked games, along with their folder and file structure, would be located.

Install games, updates, and DLC on Cemu

With the backups now unpacked into an organized folder, the next step is to tell the emulator where everything is located. From the Cemu main window, click on “Install Game Title, Update, or DLC” and navigate to the location where you unpacked the games.

Typically, the system has a structure that distinguishes between "base games," "updates," and "DLC ." First, go to the base games folder, open the subfolder of the game you want to install, and then go into "meta." Inside, you'll find a meta.xml file, which is the one you need to select to complete the game's installation on the emulator.

Once you've finished with the base game, repeat the same procedure for updates and DLC : select "Install Title" in Cemu, go to the corresponding update folder, enter "meta," and select the meta.xml file. Do the same for the DLC folder, if there is one. This way, Cemu will know that the specific game has additional content and will manage it as if it were on a real Wii U.

Once installed, the games will appear in the emulator's main list, from where you can right-click to access advanced options such as modifying the game profile, changing the CPU settings, or adjusting specific graphics packages for that title.

Performance best practices: Vulkan, shaders, and CPU

If you want to get the most out of Cemu and achieve the best possible frame rate, there are three key settings to consider: the graphics API, shader handling, and the use of multiple CPU cores. A good configuration here makes the difference between an unplayable game and a smooth experience.

First, open the Options menu and go to General Settings; from there, go to the Graphics tab . In the API section, choose “Vulkan” as the primary option, provided your graphics card supports it. On many systems, Vulkan offers significantly better performance than OpenGL, especially in terms of FPS stability and shader loading times.

On that same tab, you'll find the "Asynchronous shader compiler" option . Check it to enable asynchronous shader compilation, which helps reduce stuttering that occurs when the game generates a new shader during gameplay. With this enabled, the "stuttering" when loading a new area or visual effect for the first time is usually much less annoying.

The third key point is CPU management. From the emulator's main screen, right-click on the game you want to optimize and select "Edit Game Profile ." In the CPU tab, you'll see a section called "Mode." By default, it's usually set to "Single-core Recompiler," which is more compatible but doesn't take full advantage of modern processors.

Switch to "multi-core recompiler" mode so Cemu can distribute the workload across multiple threads . Keep the "Quantum" value at its default unless you're very familiar with the settings. Enabling multi-core recompiler often provides noticeable performance boosts in demanding games, although it can cause instability in some titles; if you experience unusual behavior, you can always revert to single-core mode.

In addition to these adjustments, it is highly recommended to use community-created shader caches . These files, with the .bin extension, are copied to the Cemu shaderCache/transferable/ folder and allow most of the game's shaders to be pre-compiled, greatly reducing real-time stuttering. They are usually available in community repositories dedicated to Cemu.

Graphics packages and mods to improve image and compatibility

Another distinctive feature of Cemu is its support for graphics packs, which allow you to modify the resolution, filtering, HUD, framerate, and even apply complete mods to some games. Many of these packs are very well-crafted and allow you to enjoy older titles as if they were remastered versions.

You can download and update these community graphics packs directly from the emulator . Once downloaded, they can be individually enabled or disabled from the corresponding menu, by selecting specific options depending on the game. For example, you can choose an internal resolution of 1080p, 1440p, or 4K, apply corrections for specific hardware, or enable texture and shadow mods.

If you manually download packages from repositories like GitHub, simply extract them and copy their folders to the graphicsPacks directory within your Cemu directory structure . Since they take up relatively little space, it's common practice to copy them all and then simply activate the ones you need for each game in the settings menu.

Using these packages and a suitable Vulkan and CPU configuration, it is possible to achieve spectacular results: games that run at 720p and 30 FPS on Wii U can be viewed on PC at 4K and 60 FPS , with sharper textures, better shadows, and a much cleaner image.

Current limitations and practical advice

Despite all the improvements, it's important to keep in mind that Cemu still has limitations and isn't perfect . Some games may freeze at certain points, some videos or cinematics may not play correctly, and not all graphical effects are glitch-free.

Another important detail is that the official Wii U online mode is not available on Cemu . The developers have made it clear that, as long as the console remains active, especially with titles like Splatoon, the emulator will not connect to Nintendo's official servers. Private servers or alternative solutions might appear in the future, but these depend entirely on the community and the Cemu team itself, since the emulator's code is closed.

Regarding the tablet controller, although Cemu emulates many of its functions, some features still don't work perfectly . For example, microphone support isn't fully implemented, and certain mechanics that depend entirely on the original hardware can be difficult to transfer to a PC. Touch input, however, is emulated with the mouse without any major issues.

If you're unsure which games will run well on your system, Cemu has an official compatibility page at compat.cemu.info , where each title is categorized according to its emulation status, known bugs, and approximate system requirements. Checking this database before downloading or installing a game will save you a lot of trouble.

Cemu has established itself as one of the most impressive console emulators, both for its progress and the quality it offers . With a suitable PC, a good Vulkan configuration, a multi-core recompiler, graphics packages, shader caches, and well-organized backups, you can enjoy a huge collection of Wii U games with visual quality and ease of use that the original console simply can't match.