Wii U is too demanding for in-browser play, so it runs through Cemu — a free, open-source desktop emulator. Here's the whole setup.
Use the button above — it always grabs the current Windows build. Format: Zip (portable).
Unzip anywhere — no install needed.
Cemu loads these file types: .wud.wux.rpxgame folder. We don't provide games — use discs/cartridges you own and dump them yourself.
BIOS: No BIOS, but some games need your console's keys (keys.txt).
Run Cemu.exe, then File ▸ Load and pick your game.
Keyboard works; gamepad recommended.