Indeed they are 
This message was sent to game publishers about a month ago:
There’ll be an End of Year Sale starting next week 15 Dec and running through to 5 Jan. We’ll get a discount coupon again as well. And the 15 days of free mystery games will also start next week and run through until 31 December.
The best guess I’ve seen on Reddit for the first game is Bloons TD 6. The colours match. And there’s balloons on the wrapping paper.
Wildcat Gun Machine looks like it’s my jam. Might have to try that one out
Divine Knockout (DKO):
Free to keep when you get it during this limited-time promotion.
Offer ends Wednesday at 10am Pacific Time.
It gives me a price of R230
It’s weird this one. From @WillySA’s link, select Divine Knockout (DKO)- Free under “Items included in this package”, then “Install” / “Play Game” to add it to your library.
Day 1 of Epic Games Store’s 15 Days of Giveaways.
Mega Popular Tower Defense Game
(That’s the entire description…)
Remember that these giveaways are only available for 24 hours. (Except for the final one which should be up for the usual one week period.)
Day 2’s wrapping paper has trophy symbols on it. Any guesses?
Behold the Kickmen:
(deal ends in 5 days)
There’s also a gust of wind type of icon. A wild guess from my side is Turbo Golf Racing.
Free DLC for a change.
Call of the Wild: The Angler – Norway Reserve : Free to keep when you get it before 5 Jan, 2023 @ 8:00pm.
Also free on Epic Games: Call of the Wild: The Angler™ – Norway Reserve - Epic Games Store
Day 2 of Epic Games Store’s 15 Days of Giveaways.
Horizon Chase Turbo is a racing game inspired by the great hits of the 80’s and 90’s. It recreates the classic arcade gameplay with unbound speed limits of fun. Full throttle on and enjoy!
Day 3’s gift wrap hint:
I’m seeing cartoon bats and wrapped sweets?
Well at least I got the “turbo” part right in my guess!
LEGO Batman has been given away before - so it could be that again
Day 3 of Epic Games Store’s 15 Days of Giveaways
Explore spooky time-traversing landscapes, don adorable new costumes that transform into powerful Hallo-warriors, and collect even Creepier Treat Cards to wield in combat against a legion of hygiene obsessed baddies.
This is a giveaway repeat.
Day 4’s gift wrap hint has devils’ horn heads and shield icons?
I am so conflicted… I already have these games in my library but I want more games to just stay there unplayed…
Day 4 of Epic Games Store’s 15 Days of Giveaways
Embark on a unique and unforgettable journey and guide Sable through her Gliding; a rite of passage that will take her across vast deserts and mesmerizing landscapes, capped by the remains of spaceships and ancient wonders.
https://store.epicgames.com/en-US/p/sable
The clue for Day 5’s giveaway features what looks like a cartoon llama?
I heard that it’s going to be Them’s Fightin’ Herds. An excellent fighting game!
Free on GOG for a limited time:
