Heavy Rain looks for sure outdated, but the story is really nice. If you accept that the control are a bit tricky and think it more like a movie it can be quite enjoyable
Answering to 2 - signal is a bit like Viber, WhatsApp etc, but the message and metadata are encrypted from end to end, meaning signal servers can’t know exactly the content. WhatsApp included this few months ago, but not on the metadata only the content of a message