It’s been a long time since Left 4 Dead 2 was released on Xbox One, but some people are still asking if it is backwards compatible. According to one user on the Xbox One subreddit, there is no way to tell for sure, as the game has not been updated in a while. However, it seems that this may not be the case - as one user who has played the game extensively reports that it is still working perfectly. So far, there is no confirmation from Valve or Capcom about whether or not Left 4 Dead 2 is actually backwards compatible on Xbox One. However, if it is then we can only hope that they will update the game so that it does not suffer from any compatibility issues.