These games all used to cost money but since then went free (which is why they qualify to be posted as a deal).
For better visibility (and since some of the games were posted a pretty long while ago) I am reposting them to draw attention to them, especially for the new users that joined Ozbargain since the postings.
All games are rated highly and definitely worth playing!
Crusader Kings II: https://store.steampowered.com/app/203770/Crusader_Kings_II/
You can still get a free DLC (Old Gods) for this game: https://www.ozbargain.com.au/node/528880
King Arthur's Gold: https://store.steampowered.com/app/219830/King_Arthurs_Gold/
The Descendant: https://store.steampowered.com/app/351940/The_Descendant/
The Desolate Hope: https://store.steampowered.com/app/298180/The_Desolate_Hope/
Heroine's Quest: The Herald of Ragnarok: https://store.steampowered.com/app/283880/Heroines_Quest_The...