Mystery Gem Bundle

Gambling is a bad idea regardless.

Saga of Sins
Tech Support: Error Unknown
Endless Alice
Silent Sector
Lilac 0

It's the "could turn out to be a collection of games worth over $1,000" option. But it's probably like 1 in 999999 chance.

I don't know how it is in other countries, but in our region you can get this bundle as a prize at Asus ROG rewards.

25 pack:

Chicken Assassin: Reloaded - Deluxe Edition
Mutazione Deluxe Edition
Etherborn Deluxe Edition
Lichtspeer: Double Speer Edition
The Darkside Detective Deluxe Edition

Night Book
Behind the Frame: The Finest Scenery Deluxe Edition
TERRACOTTA
Home Design 3D
Bridge Constructor Portal

The Metronomicon - The Deluxe Edition
Devil Spire
Twilight Memoria
Construction Simulator
The Blind Prophet

Hidden Shapes - Cat Realm
AI War 2
And Yet It Moves
Hell Pie
In Nightmare

Balrum
Cardpocalypse
Mail Mole
The Stillness of the Wind
Elypse

What's the source?

Tried one for fun.

Cardpocalypse
Paranautical Activity: Deluxe Atonement Edition
The Gap
Mutazione Deluxe Edition
Tech Support: Error Unknown
Deiland: Pocket Planet
Alchemy Story
Bee Simulator
Balrum
Tools Up!
Night Book
Wrestledunk Sports
Anvil Saga
Super Bullet Break
Dungeons & Dragons: Chronicles of Mystara (WL hit)
Bonkies
Spells & Secrets
Barrow Hill: Curse of the Ancient Circle
Beyond a Steel Sky
Godlike Burger
Mail Time
Backfirewall_
FRAMED Collection
LOUD: My Road to Fame
Home Design 3D

10 not in my library, 1 WL hit. Not bad in my opinion.

Week 1 – Golden Gems Drop
5 x Golden Gems worth $1,000 each — hand-picked collections packed with AAA blockbusters and hidden indie treasures from top publishers and rising stars.

so basically, i guess is one single "mystery key" that will contain a bundle of a bunch AAA
it seems that you may also be able to win alienware tech, like a monitor.
The bundle points to another site that's supposed to list all winnable games but i can't seem to find any full list, either well hidden or not shown, classic marketing

Dont worry, nothing. You will not get anything serious.

For the first question : they link a gdoc for all info in it, you will find what u searching for

x10 pack :

Toki
Beat Cop
Tools Up!
In Nightmare
Dr Livingstone, I Presume? Reversed
The Gap
Ashina: The Red Witch
Pure Farming 2018 Deluxe
Imperial Glory
Snow Moto Racing Freedom

From Reddit posts:

Cat Bait
Geometric Sniper - Z
WARBORN
Arcade Spirits: The New Challengers
Hunchback's Dungeon

Bridge Constructor Portal
Sophia the Traveler
I'll be Brave, Tomorrow
Twilight Memoria
AI War 2

ATONE: Heart of the Elder Tree
Night Book
To Hell With The Ugly
Necrosmith 2
Hellbound

Eden Genesis
Toki
Paranautical Activity: Deluxe Atonement Edition
Monument Valley 2: Panoramic Edition
Beat Cop

Druidwalker
ENCODYA
Beasts of Maravilla Island
Vectronom
XIII - Classic

Bionic Commando
Looterkings
Picture Everything: Puzzle Cross Galaxy
Hell Pie
Bunny Park
HYPER DEMON
Bee Simulator
Mage's Initiation: Reign of the Elements
Suffer The Night
Bloodshore
Hero of the Kingdom: The Lost Tales 3
Arto
War Mongrels
The Hive
AER Memories of Old
Geometric Sniper
Conarium
The Darkside Detective: A Fumble in the Dark
Itty Bitty Toilet Kitty
Necrosmith 2
Buckshot Roulette
Garfield Lasagna Party
The First Templar - Steam Special Edition

Spirit Mancer
Bonkies
Dr Livingstone I Presume? Reversed Escape Room
Tech Support: Error Unknown
Desta: The Memories Between
Hyper Sentinel
Immortal Hunters
Transcendence Legacy - Voidswept
ATONE: Heart of the Elder Tree
Bridge Constructor Portal
Saga of Sins
SAMUDRA
AI War 2
Mail Time
Hacknet
Geometric Sniper - Z
Monument Valley 2: Panoramic Edition
GemCraft - Frostborn Wrath

Desta: The Memories Between
Teslagrad 2
Etherborn Deluxe Edition
I am not a Monster: First Contact
Bionic Commando
Barrow Hill: The Dark Path
Desert Child - Deluxe Edition
Beat Cop
Arboria
The Ouroboros King
Growth
Pancake Patrol
Aeterna Noctis
Beholder
Hell Pie
Metro: Last Light Redux
Catizens - Game & Soundtrack Bundle
Tallowmere
Radio Commander
Geometric Sniper - Blood in Paris
Anvil Saga
Distrust
Vampire: The Masquerade - Coteries of New York
Golf VS Zombies
Ironcast
Bee Simulator
Radical Relocation
OKAMI HD / 大神 絶景版
Suffer The Night
Headsnatchers

Here's my 25-pack:

Saga of Sins
Soulstice
Summer in Mara
Aquarium Designer
Necroking
Desta: The Memories Between
BUTCHER
Suffer the Night
Bridge Constructor Portal
Stars in Shadow
Bloodshore
Tropico 4: Steam Special Edition
The Shapeshifting Detective
Shantae: Risky's Revenge - Director's Cut
The Ascent: Cyber Edition Bundle
The Metronomicon - The Deluxe Edition
Beyond a Steel Sky
Hidden Shapes - Cat Realm
Ludus
Super Buff HD
Alchemy Story
FAR: Lone Sails
Fobia - St. Dinfna Hotel
Internet Cafe Simulator 2
Jets'n'Guns Gold

I gave this a shot (twice because why not) and got the usual junk posted above plus a couple of the Collections
Mega Man Legacy collection and FRAMED collection--neither worth much.
I got a couple of WL games and a few I was looking into.

It looks like it's a sweepstakes of sorts? From their Terms and Conditions page:

3. Winners Selection. The winners of the Contest will be drawn at random at the end of the bundle period (07.10.25 – 09.12.25). Prizes available in the competition include: 1× AW2725DF Display, 1 × 1TB OLED Steam Deck + Docking Station, 1 × Gaming Chair, 1 × Pro Keyboard + Mouse in Lunar White. Winners will be notified by email and may claim their prize once awarded. The drawing will be conducted by the Sponsor, whose decisions are final. The odds of winning will vary depending on the number of eligible entries received. Potential winners will be notified by email at the address associated with their Fanatical account. Winners must accept their prize as directed by the Sponsor within 48 hours of notification. Notifications that are not responded to or that are returned as undeliverable may result in forfeiture of the prize. The Sponsor may require potential winners to sign and return an affidavit of eligibility, a release of liability, and a publicity release (collectively, the "Prize Claim Documents"). No substitution, transfer, or cash equivalent of any prize is permitted, except at the sole discretion of the Sponsor. In addition, all other prizes are instant-win prizes, available through the Mystery Gem Bundle. Instant-win prizes include:10+ × Golden Gems worth $1,000 each, 1 × AW2725DF Display, 1 × 1TB OLED Steam Deck + Docking Station, 100 × AAA Game Keys, 1 × Gaming Chair, 5 x GOTY Packs and Alienware Pro Wireless Gaming Keyboard, Alienware Pro Wireless Gaming Mouse in Lunar White, Alienware Pro Wireless Gaming Headset.