Who would’ve thought? This isn’t going to fly with the EU.
Article 5.3 of the Digital Markets Act (DMA): “The gatekeeper shall not prevent business users from offering the same products or services to end users through third-party online intermediation services or through their own direct online sales channel at prices or conditions that are different from those offered through the online intermediation services of the gatekeeper.”
I’d argue that there are a lot of offline mode frustrations with Steam but none of them are Steam’s fault, they are all due to individual games online requirements or DRM implementations.