Actually are Quake 4 and Wolfenstein: Enemy Territory.
You need to use the Xbox Insider Hub app to claim both.

I am not too thrilled that they give away GOG versions of games and don't even remove all GOG files (icon,webcache,installhelper are still in the package).

Epic Games:

Ancient Enemy - Link
This is a dark fantasy RPG card game with a twist of action!
A turn-based combat with numerous abilities and spells in your hand
Choose your path and defeat any monstrous foe that stands your way
In a world dominated by powerful evil forces, can you defeat the deadliest of them all?
Pick your cards wisely

Single player only

Killing Floor 2 - Link
A popular horror First Person Survival Shooter that sets place in Europe
Prepare for slaughtering mayhem with tons of blood and gore.
You fight against bloodthirsty clones created by Horzine Corporation.
Multiplayer and Co-op modes are also available too.

Repeat

Other ongoing giveaways:
none

Next time: Wonder Boy The Dragons Trap

Actually there is a free cosmetic DLC for World of Warships
https://store.epicgames.com/en-US/p/world-of-warships--transformers-free-container

[IndieGala] (Game) Echo of the Wilds - free

https://freebies.indiegala.com/echo-of-the-wilds

Epic Games:

Idle Champions of the Forgotten Realms - Link
A Dungeons & Dragons strategy management game
Uniting characters from throughout the D&D multiverse into a grand adventure.

DLC

Single player only

Note: Claim Baeloth's Gladiators of the Black Pits Pack (100$ value+) by logging into Idle Champions of the Forgotten Realms through the Epic Games Store before next week

Wonder Boy: The Dragon's Trap - Link
This is an indie platformer
You are half human half lizard!
Now you must find a cure!
Boasting beautiful, hand-drawn animations and a re-orchestrated soundtrack,
the cult classic returns with a unique blend of exploration, action, and adventure!

Other ongoing giveaways:
none

Next time: Shop Titans and Tannenberg

Edit: typo

Epic Games:

Tannenberg - Link
Tannenberg brings the massive battles of the Eastern Front in WW1 to life
64 players fighting for control of key sectors of the battlefield
Is an action and shooter game.

Single Player, Multiplayer and Coop are all available



Shop Titans - Link
Shop Titans is the ultimate RPG shopkeeper simulation.
Craft powerful equipment, stock your shop and sell to aspiring heroes… at a markup!
Funny cartoonish style, is your typical casual game


Single Player, Multiplayer and Coop are all available

Note: Claim the exclusive pack of DLC (100$ value+) by logging into Shop Titans and Reach Level 8 (existing or new players) through the Epic Games Store before next week

The exclusive pack includes the following
• Blueprint: Champion Vigil
• Blueprint: Assassin Tanto
• Blueprint: Dismantler's Pickaxe
• Blueprint: Fizzy Guzzle Bottle
• Decoration: Valiant Banner
• Decoration: Oni Shrine
• Decoration: Llama Pinata
• Shopkeeper customization: Good Ol' Pickaxe
• 50 Argon Tokens
• 50 Antique Tokens
• 3 Slimy Keys
• 3 Slimy Chests
• 200 Webbed Wings (crafting material)
• 200 Moon Crystals (crafting material)

Other ongoing giveaways:
none

Next time: Lawn Mowing Simulator

Dead Drop is free on IndieGala - link

This is a local multiplayer two-player game.
Free games on this site are always without DRM.

CDPR Goodies Collection: Link.

Epic Games:

Lawn Mowing Simulator - Link
Want to enjoy your beautiful lawn without getting your feet dirty?
Without the sun beating onto you and causing a sweaty mess?
Frolicking around nature without a nagging spouse?
Well you're at the right place!
Lawn Mowing Simulator is for you!
Beautiful British countryside is the perfect aesthetic and relaxing scenery for you!
You have Career Mode, Free Mode for the casual folks or Challenge Mode for some extra fun
Authentic British green pastures are waiting for you!

Only single player sadly.

Other ongoing giveaways:
none

Next time: Unrailed!

It is Republique's anniversary and the developers have made their game free on steam!
Republique
Republique VR

As well as Oculus

Epic Games:

Unrailed! - Link
You ever played a game of shooting objects as far as you can and the game measures the distance?
What about Overcooked on a gaming night with your pals?
This co-op couch party game is the combination of both!
Working to dodge obstacles on the constantly generating and moving environment
You must work with your friends to build and maintain your railway as long as possible
Except there are no food fumes, only dangerous terrains and dusty train tracks
This competitive co-op game will rile up you and your friends in no time!
And you'll be beating each other over the head!
Of course, that is what you want...right?

Competitive multiplayer with both online and co-op options are available
The only downside: Loops the same song

Other ongoing giveaways:
Multiverse - F2P

Next time: Cook, Serve, Delicious! 3?!

Despotism 3k on Steam

Cook, Serve, Delicious! 3?! on Epic
https://store.epicgames.com/en-US/p/cook-serve-delicious-3-fb9aae



edit -- I did a quick test, and it looks like it will run outside of the Epic launcher without any switches.

Epic Games:

Cook, Serve, Delicious! 3?!! - Link
If you like Diner Dash, you'll like this game
Serving customers behind the counter. Your accuracy and speed will matter
If your order is served in a proper and timely manner, you will receive tips and good reviews!
Grow the reputation of your restaurant and upgrade your restaurant!
This is the third game, taking place in a food truck after a war-torn America period.

It features single player and coop.

Other ongoing giveaways:
none

Next time: Rumbleverse™ - Boom Boxer Content Pack