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Will there be some twitch stream for any announcement or will you just have some setups for people to try out upcoming stuff without any live stream?
I'm not 100% sure on this but my advice would be to keep a weather eye on the Gamescom communication in general. I think they do an opening night show thing that's probably streamed. We will also be pushing out social posts during the event to keep people who aren't able to attend in person up to date.