While previous Sniper Elite 3 DLC challenged players to assassinate Hitler, the latest campaign add-on tasks them with saving Winston Churchill.
It will come in three parts, with part one now live on Steam for PC (£4.99). It was launched alongside the new Patriot Weapons Pack (£2.99) and a free update featuring a new multiplayer map called Airstrip.
The DLC was announced in a new video in which Rebellion provides an update on its future plans for the game, which include confirmation that all DLC will also be released on PS4, PS3, Xbox One and Xbox 360.
Rebellion says: "Set after the events of Sniper Elite 3, Save Churchill follows OSS sniper Karl Fairburne in his attempts to uncover and prevent a Nazi assassination attempt on the British Prime Minister in the run up to the famous Casablanca Conference of 1943."