This may have been posted elsewhere, but this is just a heads-us for those that are interested. Surviving Mars
(the base game) is free to download on Epic Game Store until October 17th. https://www.epicgames.com/store/en-US/product/surviving-mars/home
And 2 of the DLCs.
Oops!, yeah, I did notice them after posting, but thought people that were interested will find them when browsing the
linked page, so decided not to edit my post.
Thanks for the reminder, and bringing it to others attention. :)