First spotted by CharlieIntel, two videos shared on Twitter that appear to be from a cancelled Xbox 360-era Call of Duty game called "Future Warfare" or "NX1." The source appears to have been confirmed by a former senior developer at Neversoft who was working on the project.

The first video was shared by an account with the handle @mangafigurines (with an embedded YouTube upload of the same video) and shows a first-person perspective of a player's space suit being breached on the moon and fleeing to a nearby base under attack A cinematic sequence is shown.

A second video shared by Twitter user @catgurlfriend purports to show NX1 multiplayer on a map themed around an abandoned desert town. The player switches between a two-gun Glock 18 (very common in CoD) and a far more interesting futuristic DMR-like rifle.

The lunar base footage in particular gives the impression of being too high quality to be a convincing mod, but the most convincing evidence for its authenticity comes from Neversoft developer Brian This is by Bright, whose Neversoft is best known as the developer of the "Tony Hawk's Pro Skater" series and later worked on "Guitar Hero" and "Call of Duty," which eventually merged with Infinity Ward in 2014.

Commenting on the lunar base video, Bright said that NX1 was Neversoft's first experiment with the Call of Duty engine. Neversoft switched from Guitar Hero to create a futuristic CoD game," he said. The mission was on the moon, with some low G experiments to help the team learn the engine."

"I think this was an alternative to Ghost, but I'm trying to remember. There were 2-3 campaign missions before the cancellation and a lot of MP work (I was the leader of this mp).

Bright added that the multiplayer map in the second clip could have been named "Sandstorm" and that NX1 would have included an "escort" game mode years before we see something similar in 2020's "Black Ops: Cold War" mentioned.

While NX1 is a direct predecessor to 2013's Call of Duty: Ghosts, it is also strongly reminiscent of 2016's Infinite Warfare. It is unclear how the Twitter user in question obtained the NX1 footage and how many unfinished games are out in the wild.