Product:
Yakuza series
Retailer:
Xbox Live, PlayStation Store
Discounted Price:
CAD $4.99 75% Saving was CAD $19.99
Valid Until:
Forever
Deal Link:
A whole bunch of Yakuza games are on sale on both Xbox Live and PlayStation Store (sadly, Steam doesn't seem to have any discounts). PS4 is cheaper (probably because the games have been out for longer versus Xbox) but the Remastered Collection, which contains remastered versions of Yakuza 3, 4 and 5, are only on sale on Xbox for some reason.

For anyone new to the franchise (welcome!), the games take place chronologically in the following order: 0 --> Kiwami (remake of 1) --> Kiwami 2 (remake of 2) --> 3 --> 4 --> 5 --> 6. (Like a Dragon is the 7th game in the franchise and has a new protagonist and standalone story, so can technically be played by newcomers without any issue, though you'll miss out on some references to previous games.)

Note that if you have Xbox Game Pass, I think all the Yakuza games are currently available on the service as well.

PlayStation Store
Xbox Live
PS4 deals end December 2nd. Not sure when the Xbox One deals end, though.