Axios has rediscovered a long-lost exclusive release for the original Xbox, which was developed by the team behind a series of acclaimed Star Wars games and quietly canceled by Microsoft two decades ago.

Why it matters: Knights of Decayden (sometimes spelled as Decadyn) has been largely unknown to the public until now and helps highlight a hidden part of early Xbox history.

• Axios is even able to share exclusive footage of a build of it in action.

Details: The game went by many names, including Knights of Utu, when it was pitched in 2000 to Sony as a PlayStation 2 game.

• It was then called Archipelago early in its development at Xbox, where the name was changed to Knights of Decayden.
• The team behind it, Totally Games, was best known for Star Wars: X-Wing and a series of sequels.
• Decayden also focused on flight combat but set in an original fantasy world.

Trading X-Wings for flying beasts: Players controlled a knight on a flying seahorse and engaged in ranged combat against other knights and monsters, lance-based slow-motion jousting and diving underwater to fight sea creatures.

• From the pitch to Sony: “​​Imagine jousting high in the air amid skyscraper-like islands soaring above a sparkling sea.”
• Plans called for a single-player story mode and multiplayer.

Alternate history: Decayden was to be an Xbox exclusive, releasing within a year of the system’s late 2001 launch.

• It would be a signature release from an operation called Studio X that focused on partnerships between Microsoft and outside game teams.
• Instead, it was canceled in early 2002, an early casualty in Microsoft’s effort to enter the console market and create games to rival the output of PlayStation and Nintendo.

What they’re saying: Totally Games founder Larry Holland remembers the project as “incredibly ambitious and sort of foolish in equal measures.”

• Holland said the process of creating a brand new world and crafting unique flight combat proved overwhelming.
• Worse, though, was a time crunch. “I agreed to a very aggressive schedule,” he said, “probably more for financial reasons and to keep my organization and company not having to lay off a bunch of people.”
• That put the team perpetually in a squeeze, while trying to please early Microsoft game managers who Holland said didn’t have much experience trusting developers. (One boss, he recalled, had previously managed the Excel spreadsheet program.)

No surprise: Holland acknowledges that the game was still rough when it was canceled in early 2002.

• “We hadn’t ironed out all of the issues with regard to scale and speed and melee.”
• He described the cancellation as “demoralizing” but expected: “I learned a lot about what to attempt and what not to in terms of sort of risk-taking and at least balancing the risk-taking with the schedule.”

Today’s spotlight on Knights of Decayden exists because of a passing remark from longtime Microsoft gaming executive Phil Spencer.

Driving the news: Earlier this year, Spencer walked Axios through his career at Xbox for our profile of him, and noted that the first assignment he had when he joined the Xbox gaming team was to “cancel Larry Holland’s game.”

• In 2001, Xbox executives had tapped the enterprising Spencer, who was already a Microsoft veteran and known gamer, to oversee Studio X.
• He didn’t know Holland and hadn’t canceled a game before.
• During our interview, Spencer briefly uttered the name “Knights of Decayden,” but didn’t spell it. A Microsoft PR person spelled the game’s last word as “Decadyn.”

Chasing it down: There is barely any information online about the game.

• When we searched “Knights of Decadyn” after the Spencer chat, it returned a single result in Google in the signature of a user posting to an Xbox forum in May 2002. The user listed the game as one of dozens of “sweet upcoming Xbox games.”
• Weeks after our Spencer interview, Holland, who now designs games for Asylum Labs, happily shared more details with Axios. He revealed that he’s awash in notes and files from his decades of game development and even had an executable for Dacayden but hadn’t been able to run it yet.
• He sent over a pitch document, talked about the game in detail and shared a video. “Technology has advanced quite a bit,” he said after screening it again.

Previous glimpses: In 2009, the game was added to a compendium of canceled games called Unseen 64, under the spelling Knights of Decayden.

• The listing includes a few pieces of concept art scraped from artists’ online portfolios, a logo and several vague screenshots.

The bottom line: As Holland put it to Axios: “We're probably the only two people in the last two decades to talk about this.”

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Out today for PC, Xbox and PlayStation, Escape Academy is a virtual take on escape rooms that you can play solo or with a second player.

• As the name suggests, players enter a fantastical university in which they are graded on their ability to solve puzzles and escape locked rooms as swiftly as possible.
• The developers at Coin Crew Games recommend you keep a pencil and paper handy, which makes it all the more satisfying when you can solve a room without one.

Escape Academy starts in a very ordinary escape room, the kind that might exist in our world. As you begin decoding messages and finding keys, you find your way to the game’s extraordinary academy.

• I’m having a good time but haven’t finished yet.
• Reviews point out it’s a bit on the short side, running about eight hours for The Verge, for example.
• But the game will be expanded post-release, and, hey, sometimes a game can be good and short. For example, there are the other 3D puzzle-room games in the Portal and The Room franchises, all of which are highly recommended too.