I was going to post this message in the Limited-time free Steam/Origin/etc. games thread but it doesn’t quite fit that category. So I decided to create this thread. If you here of any Free for the week, Free for the weekend games (on Steam or elsewhere) and any Open Betas that are running you can post it here. To clarify this for games that are free to play for a limited time - not free to own during the time period, nor free-to-play permanently either.
Anno 1800 is free to play for the week (19-25 August) which is pretty cool considering this in one of the best Anno’s so far.