Sledgehammer Games, the studio behind of Call of Duty: Advanced Warfare, was first formed when Activision poached the creators of Dead Space and brought them in to work on a similarly themed third-person shooter. The only difference was rather than the deep reaches of space, this horrific story instead took place in the real world during the Vietnam War.

During its development, Activision and Infinity Ward’s little political hissy fit was underway, and Call of Duty: Modern Warfare 3, one of the most pre-ordered games in history, was thrown into limbo. Something had to be done, and Sledgehammer jumped at the opportunity to finish production. Call of Duty: Modern Warfare 3 went on to be the biggest game of the year, earning Sledgehammer a spot in the main Call of Duty rotation.

Sadly, though, war is hell, and the biggest casualty of this affair was this interesting third-person shooter. Sledgehammer’s Call of Duty spin-off was sidelined indefinitely.

It looked like it could have been pretty decent, too. Clearly, Sledgehammer had a darker and more disturbing look at war in mind. Something more along the lines of Spec Ops: The Line meets Apocalypse Now. Something more terrifying than Dead Space and more believable than the over-the-top main games, because this actually happened.

Concept Artist Eddie Del Rio has released a few of his pieces which detail the game and his vision of Vietnam. By all means, I’d be way more excited to play this than Advanced Warfare if given the choice. Sadly, this will just be written off into history as one of the best games you’ll never get to play.