So, if your game file is in a .7z archive, the process isn't "play," but "extract first." The file inside, once decompressed, is likely the actual game image you need. This is exactly what happened in a forum post from October 2021, where a user discovered that their "Metroid Prime ISO" was actually a .7z file that needed to be extracted with a program like 7-Zip.
: An older extension used specifically for GameCube disc images (interchangeable with .iso). 7z file dolphin emulator 2021
To access the playable game file inside a 7z archive, you need a free extraction utility. For Windows Users So, if your game file is in a
A .7z file is a compressed archive format (similar to .zip or .rar ). Because GameCube and Wii games can range from 1GB to over 4GB, archival sites compress them into 7z format to save space. A 4GB Wii game might only be 2GB when compressed, making it much faster to download. To access the playable game file inside a