Cemu

Cemu is an open‑source emulator for the Nintendo Wii U console, designed to run the system’s games and software on personal computers. It was first released in early 2013 and has since been updated regularly by a community of volunteer developers. The emulator is written primarily in C++ and supports Windows, macOS, and Linux operating systems.

One of Cemu’s most notable features is its ability to upscale Wii U games to 4K resolution while maintaining smooth performance. The engine employs a software-based rendering pipeline that imitates the Wii U's GPU, and a configurable frame‑rate limiter allows users to run games at 60 frames per second or higher. It also supports gamepad, keyboard, and mouse input, and includes options for custom shader programs, texture reloading, and controller mapping.

The project follows an open‑source license, and Cemu’s source code is available on public repositories. Development is driven by community submissions of patches, bug reports, and performance improvements. The emulator’s roadmap includes bolstering support for newer titles, reducing CPU overhead, and expanding compatibility with accessories such as the Wii Remotes and Wii U Pro Controllers.

Legally, Cemu is intended for personal, non‑commercial use. Users are expected to own the Wii U titles they choose to play, and the emulator’s developers have stated that it is not intended for piracy. While the software itself is free, installation of game copies must be performed by the user in accordance with local copyright laws.

Overall, Cemu has become a key resource for players and developers interested in exploring Wii U software on modern hardware, providing high‑quality emulation and contributing to the preservation of the platform’s game library.