1. The Sentinel
2. Sentinel Worlds I: Future Magic
3. Star Command
4. Star Fleet II: Krellan Commander 2.0
5. Ultimate Admiral: Age of Sail

Rise of the Tomb Raider
Rage
Assassin's Creed 2
Skyrim
Doom (2016)

Thanks!

Honourable mentions. Not counted since my list is already full, but just for bragging rights if those do come here:

Gods, Max Payne 1 and 2, Myth 1-3, Quarantine series.

Love the idea of honorable mentions! Will probably add mine after today.

Slime Rancher 2
Untitled Goose Game
Hellblade II
Metal Gear Solid V: The Phantom Pain
Spelunky 2

Honourable mentions:
DMC, any of them, seriously...
God of War
Subnautica....

I wanted to say Outlast Trials, and Kerbal Space Program 2 but I think that's against the rules so I will include them ere

and Outer Wilds too. Totally want that game to come

Even though drxenija post is a few hours after 0:00GMT, I'm counting it as a valid entry.

However, all posts after this one won't be considered valid entries.

Again, some good (probable) guesses, and some not so probable (looking at you, Droidworks. 8 years and counting!)...

I had some games in mind that I wanted to include in my honorable mention list, but it's 6:30AM right now, and I forgot most of them. Maybe tomorrow.

No one guessed SpaceVenture? Pshaw!

Honourable mention goes to Duke Nukem 3D. Here's hoping.

(It has a tantalizing presence in the offline installation progress box as one of the game ads being looped (at least for some older offline installers) so how can we be expected to forget ..)

Mmm yeah I think we'll see the 2018 GoW pc conversion, but only later. I don't think anywhere before 2024 or 1025.

can i win horizons zero?
dont worry abotu xeno 2 , looks like that wont be finished ever

so when will you know who won? next year?

Well, yeah... :P

Chiming in (late!) to show my support for your giveaway. Deadline missed, so I'm in strictly for the fun and not for the win. ;)

/ reading the green tea leaves at the bottom of my tea cup for divinatory messages /

Hmm..., it appears my herbal dregs have an important message for me and it is: "Time to put the kettle on and make some more tea, please!" :P

And while I do that, let me share with you my picks:

TOEM (by Something We Made)
Stray (by BlueTwelve Studio)
Cozy Grove (by Spry Fox LLC)
Cities Skylines (by Paradox Interactive)
Skyrim (by Bethesda Game Studios)

:D no magic ball?

Cities Skylines would indeed be a nice addition to GOG. Lost hope in Skyrim showing up here, though.

Missed the deadline, automatic not-in status.
My picks, in order of probability:

1) Arthurian Legends
2) Selaco
3) STALKER 2
4) Halo Master Chief Collection
5) Quake Enhanced

We got one!