Activision, Aniplex, Bandai Namco, Bethesda, Blizzard, Com2uS, EA, King, Mixl, Niantic, NCSoft, Netmarble, NetEase, Nexon, Nintendo, Pearl Abyss, The Pokémon Company, Riot, Square Enix, Supercell, Tencent, Ubisoft.

The goal was to pitch all 22 by August 2019.

As of a later document, Google says 20 out of 21 devs signed. I’m not clear whether those were the same 21 or different ones — we also heard that Supercell rejected a deal.