Use the following code to get a game of your choice for free on Big Fish Games:
https://www.bigfishgames.com/pc-games/
FREEGAME865035
FREEGAME449269
Remember to untick Big Fish Game Club Free Trial, so they won't ask for your payment information.
I would go for a Collector's Edition ;) Here is a Best of 2020:
https://www.bigfishgames.com/us/en/game/best-of/2020/pc.html
Also they have some Steam Games like
Beholder:
https://www.bigfishgames.com/games/11672/beholder/?pc
Glass Masquerade:
https://www.bigfishgames.com/games/18136/glass-masquerade/?pc
Syberia 1+2 - I think 3 is not the same as on steam:
https://www.bigfishgames.com/games/7059/syberia-part-1/?pc
https://www.bigfishgames.com/games/7274/syberia-part-2/?pc
Book of Demons (no freeplay mode in Big Fish Version, just story mode)