One more game I wish had been released, C&C Renegade 2. That game (from what we know about it) would have been awesome.

I wish Jagex (before they turned into the ESG-laden cesspit they are now) would have actually released both Stellar Dawn and Transformers Universe. I was never a huge Transformers fan as a kid but I played the beta of that game and it was fun. Moreover, I would have loved to have seen old Jagex's approach to a sci-fi game and the little we knew about Stellar Dawn really did sound like it'd be a downright awesome MMO.

I would love a proper Batman Arkham sequel ( direct sequel to Arkham Knight or Arkham Origins 2).
It would probably be infinitely better than the cheap Gotham Knights or the Online-only Suicide Squad game noone asked for...

https://www.neogaf.com/threads/legacy-of-kain-dead-sun-updated-with-e3-2012-square-enix-teaser-and-pre-boss-video.997613/#post-153305912

Legacy of Kain: Dead Sun (32min HD video of the cancelled successor to Soul Reaver)

Schuytema Prey


https://duke4ever.altervista.org/prey/textdocs/Full%20Prey%20story%20treatment%201.html

https://www.youtube.com/watch?v=l4jgh3VdNm4

Nexus 2 would be amazing.

Bauldurs Gate 3 The Black Dog. I'm curious about the new BG3 though.

A sequel to Sid Mier's Alpha Centauri

And to think that way more time passed now since the sequel was attempted and abandoned after failing to be crowdfunded than between the original game's launch and that attempt... Sure doesn't feel like it.

Descent Underground
Interstellar Marines
Freespace 3
Huxley
Fractured Space
MANDATE
Heavy Gear: Assault
EM-8ER
Flagship

Half-Life 3

Every Half-Life main game are truly innovative, beyond the time of their release. Really curious how the next game would be in our technology state. Honestly I thought Half-Life Alyx was the 3rd game, but sadly not :'(

Recently started playing Dragon's Dogma: Dark Arisen (which I still don't know why I've hold off on for all those years) with a female warrior modelled after a certain chainmail bikini-donning sword & sorcery character and realised how much I'd enjoy a full-blown The Witcher 3-like open world action adventure with RP(-lite) elements and a good adult-oriented story (not shying away from sex & violence, even sexual violence), set in the Hyborian Age and the player taking on the role of a faithfully and true-to-the-source-material characterised Red Sonja.

https://archive.org/details/projectapollo_202212

Project Apollo by Monolith Productions

"General Gameplay Loop:
What were the core actions players repeated throughout the game?
Primarily stealth and combat being the two main gameplay loops. Was to include the nemesis system (an earlier version) that we saw in Middle Earth: Shadow of Mordor.
There was access to vehicles, the Tumbler being confirmed.

Open World:
Did the world feel alive and interactive, or was it empty and lifeless?
Hard to say, too little is known. Project Apollo was quite early on.

Inspiration:
Did the game borrow elements from the Batman Begins movie or the Arkham games?
I would say that the game itself borrows quite heavily from the Batman Begins game in terms of stealth and cover, but could be compared to something like Splinter Cell with light and shadow, night vision and wall hugging mechanics.

Combat Mechanics:
How did combat function?
Also difficult to say, you can see snippets of combat moves in the upgrades screen.

Footage Authenticity:
Was the shown footage actual gameplay or pre-rendered cinematic footage?
The footage shown is actual gameplay.

TLDR: Monolith Games, developed alongside Arkham City (another contributing factor to the cancellation), Were never given the thumbs up by Nolan, ultimately cancelled.

Fun fact: Batman's model was actually used in early testing for Middle Earth: Shadow of Mordor as a placeholder for what would eventually become the Ranger of the Black Gate, Talion."

https://archive.org/download/projectapollo_202212/Apollo%20Early%20Test%20%5BGyY_jadBrRA%5D.webm
https://archive.org/download/projectapollo_202212/Apollo%20Minigame%20Prototypes%20%5B4yOw7BuQ3xI%5D.webm
https://ia801408.us.archive.org/32/items/projectapollo_202212/BE%20UI%20Highlights%20%5BJ9teWw59ObY%5D.mp4 (webm version)

https://archive.org/download/projectapollo_202212/apolloDNA-1.jpg
https://archive.org/download/projectapollo_202212/apolloDetective-1.jpg
https://archive.org/download/projectapollo_202212/apolloEvidenceWeb1-1.jpg
https://archive.org/download/projectapollo_202212/apolloEvidenceWeb2-1.jpg
https://archive.org/download/projectapollo_202212/apolloHUD-1.jpg
https://archive.org/download/projectapollo_202212/apolloTalentTree-1.jpg
https://archive.org/download/projectapollo_202212/apollogadget-1.jpg
https://archive.org/download/projectapollo_202212/apolloquest_1.jpg
https://archive.org/download/projectapollo_202212/apolloquesticons-1.gif
https://archive.org/download/projectapollo_202212/batman-tumbler-from-canceled-monolith-productions-game-v0-ebexkayzet1a1.jpg
https://archive.org/download/projectapollo_202212/joel-cuellar-apollo-3d-tumbler-main%20%281%29.jpg
https://archive.org/download/projectapollo_202212/joel-cuellar-batman-tumbler-videogame-joel-cuellar-monolith-3d-game-artist.jpg
https://archive.org/download/projectapollo_202212/joel-cuellar-batman-tumbler-videogame-joel-cuellar-monolith-3d-world-artist.jpg
https://archive.org/download/projectapollo_202212/joel-cuellar-tumbler-batman-tumbler-videogame-joel-cuellar-monolith-game-art.jpg
https://archive.org/download/projectapollo_202212/joel-cuellar-tumbler-batman-tumbler-videogame-joel-cuellar-vehicle.jpg

As nobody mentioned, I would like to remind that Jazz Jackrabbit 3 was never finished.

I loved the original Prey by Human Head Studios. I wish it's sequel wasn't cancelled. :(

Jazz Jackrabbit 3D,Sonic X-Treme.

The sequel to Indina Jones and The Fate of Atlantis:

https://www.eurogamer.net/indiana-jones-and-the-fate-of-atlantis-cancelled-sequel-detailed

"Lucasarts' seminal 1992 point-and-click adventure classic Indiana Jones and the Fate of Atlantis nearly received a sequel before being consigned to the grave.
Soviet major and Nazi hunter Nadia Kirov capturing Indy before teaming up with him.

As detailed by The International House of Mojo, Lucasarts was waist deep into production on a follow-up Indiana Jones adventure. Dubbed Indiana Jones and the Iron Phoenix, the game was to be set in 1947 as Indy races Nazis to find the Philosopher's Stone (before Harry Potter was created, mind) that could be used to resurrect Hitler. The full game would have featured Indy searching for three pieces of the Philosopher's Stone with a finale set in South America."