Valve didn’t receive a cease and desist. (edit: Well, they did, but from this post's author, Valve initiated the conversation, not Nintendo)

> In this case, none of this process was followed. To the best of my understanding, this is what happened:

> 1. Valve legal contacted Nintendo of America to ask "hey, what do you think about Dolphin?"

> 2. Nintendo replied to Valve "we think it's bad and also that it violates the DMCA anti-circumvention provisions" (note: nothing about violating copyright itself). Also "please take it down".

> 3. Valve legal takes it down and forwards NoA's reply to the Dolphin Foundation contact address.

edit: I think their note isn't exactly accurate either. As far as I know, the anti-circumvention provisions are a part of DMCA and copyright as a whole. Though, this does not sound like it was a proactive decision by Nintendo, so I am doubtful they have plans to sue the organization behind Dolphin's emulator.

edit 2: Though, the response back to Valve, however it may have occurred, was the following

> Because the Dolphin emulator violates Nintendo’s intellectual property rights, including but not limited to its rights under the Digital Millennium Copyright Act (DMCA)’s Anti-Circumvention and AntiTrafficking provisions, 17 U.S.C. § 1201, we provide this notice to you of your obligation to remove the offering of the Dolphin emulator from the Steam store

Does it even matter? In the US emulators do not violate any laws.

Samsung does have its own store for stuff that's essentially a duplicate of what's available on Google Play. F-Droid is a store for open source apps that are often also available on Google Play. Nintendo could create its own store for its games, why not?