Saint Nicholas' day is coming. Some of you might not know it, but he's the "original" Santa. In my family on Christmas gifts aren't bought by Santa but by the baby Jesus or an angel.
Anyway, back to the topic, on the eve of the 5th of December as a child you have to clean your boots and if Saint Nicholas finds your boots clean then you will find some presents in them.
So time to prepare children! For this occasion I have several gifts for you which you have to guess before receiving them. The first who posts a correct game name, will have 2x the chance to win it.

Shelter - Steam - Hint is here
Spacechem - Steam - Hint is here (2x chance goes to tascodlx)
Realms of Arkania 1+2 - GOG - Hint is here
Torchlight - GOG - Hint is here
Deus Ex - GOG - Hint is here (2x chance goes to Charon121)

Bonus hint: C and D were freebies at some points.

Please note that the hints might be vague and imprecise.
Also my second condition for entering is to write about the winter holidays, what customs you have, how do you celebrate or what gifts were the best you've received so far.
Since from Wednesday I'll be out of the country, this might not end on Saint Nicholas day, for which I hope you'll forgive me. The games however will be revealed at least 1 day before drawing ends if no-one guesses them before that. Until the game names are guessed, you can enter by specifying which game you want.
Also please enter only for a maximum of two games in order of preference. You can also enter for others.
Good luck everyone, and I will check your boots ;)
Please read OP, just saying I'm in will not make you be in!

Game C and E hints seem to not work.

I've just fixed hint C. Hint E works for me, but let's check again. Changed hint E please check again.

So, we are to guess which games are given away? Well, I'm pretty sure A is Shelter. I'll see if I can figure out the rest, later (not in for Shelter because I already have it). Thanks for the GA.

It's still random draw, but to increase your chances you can guess the games :)
Yes, A is Shelter... Please don't reveal the rest if you don't want them :)
You can check with me if unsure via PM

Is it maybe Little Inferno?

Nope Nope
Some hints are not too obvious at first... just saying

Is B Hearthfire?

No

and no

Hmm this one is going to bug me. at first I thought 3 was E.Y.E divine cybermancy but that is not on gog.

hmm last stab at 3 for now. Spacechem? it dose look like the pyramid things core its box art.

edit: just remembered that there were eyes in Riven. could it be that instead maybe?

dark eye chains of satinav

Oh, that was pretty clever. Not my cup of tea though. +1 :)

We also have presents in boots on Santa Claus ! :D

B is Don't Starve!