Once that’s downloaded, open up the Dolphin File Explorer (the blue bag icon) and navigate to your Downloads folder. I made a full guide to install EmuDeck, but the quick version is to go to the EmuDeck website, and click on Download Installer. Not only will EmuDeck install a bunch of different emulators, it’ll also configure each of them to work specifically with the Steam Deck and it’ll set up the whole file structure and folders for you. If you don’t know what the second option is, I’d go the EmuDeck route.
The second, is to install it through the Discover store. The first, and the easiest, is through EmuDeck. There are two ways to install PCSX2 on Steam Deck. Click on Switch to Desktop, and after a few seconds you’ll be where you need to be. To enter this mode, boot up the Steam Deck as normal, then hold the Power Button until a menu appears.
