Valve specifically drew Nintendo's attention to the presence of Dolphin Emulator on Steam

I think you've already heard that Nintendo blocked Dolphin Emulator on Steam, allegedly due to DMCA, but as it turned out, this is not yet

the whole story.According to materials The Verge provided to the publication by the Dolphin development team, Valve helped Nintendo draw attention to the Wii and GameCube emulator on Steam and unilaterally blocked it, without even giving the Dolphon developers the opportunity to defend themselves.

Valve itself does not deny this:“Given Nintendo's history of taking action against certain emulators, we took early notice of this after the Dolphin team announced that it would soon be coming to Steam”, – Valve representative Kaci Aitchison Boyle tells The Verge.

Copies of the emails have also recently surfacedfrom Nintendo's lawyers to Valve, where the Japanese company makes the usual “request to remove DCMA”, which is why Valve did not give Dolphin the opportunity to defend itself.

Overall, the situation looks a little strange and confusing, but Dolphin fans need not be discouraged – The emulator is still available on the official developer website.