GB Operator is an adaptor for GBA cartridges that lets you run them on PC. The device’s creators, Epilogue, have been testing out whether it works with Steam Deck recently. Epilogue tweeted that they’ve checked the GB Operator and its Operator app on the handheld PC, and it’s “fully compatible”. To prove it, they shared a photo of Mario Kart: Super Circuit – my second-favourite Mario Kart – running on a Deck. It’s not a perfectly portable experience due to the trailing wire from the GB Operator, but if you’re sat about feeling antsy for some Advance Wars, Golden Sun, or, I dunno, Street Fighter Alpha 3: Upper, then it seems like a convenient enough option. You can even use the Game Boy camera, as it works with Game Boy and Game Boy Color games too. Epilogue say they’re hoping to make versions of the adaptor for other consoles in the future. You can read more about how to connect a GB Operator to Steam Deck here. There’s more info about GB Operator on Epilogue’s site here. The adaptor would set you back around £44/$50/€51.