RPG or maybe point and click game about time travelers who goes back to WW2 to take over the world. However, instead of helping the Nazis like in every other story involving bad guys going back in time to WW2, they help the Americans.
They arrive in the 30's before WW2 and use their technology to help America end the depression, becoming powerful political figures in the process. Their leader defeats FDR in a presidential election. They completely cut off support to Britain and France, letting the Axis power demolish Europe. They enter the war after Europe has been practically conquered by the Axis powers, they then use their technology to defeat the Axis with ease. With Europe being destroyed by the war, America basically annexes it without much protest. They then take down the Soviets and the Chinese, all while keeping the American people docile by continuously introducing new technology that makes their lives easier while they continuing to implement their agenda of global conquest. And since there's no constitutional amendment to limit presidential terms, their leader continues to get re-elected.
The main plot of the game would be about you going back to various points in history to undo the changes these time travelers have made. History changes based on the choices you make. A choice that may seem good could end up with disastrous consequences while "bad" choices must be made to restore the timeline. For example, these time travelers are using their future tech to help America defeat the Axis powers, so you might have to sabotage that effort, which in turn means allowing a lot more people to die.
They arrive in the 30's before WW2 and use their technology to help America end the depression, becoming powerful political figures in the process. Their leader defeats FDR in a presidential election. They completely cut off support to Britain and France, letting the Axis power demolish Europe. They enter the war after Europe has been practically conquered by the Axis powers, they then use their technology to defeat the Axis with ease. With Europe being destroyed by the war, America basically annexes it without much protest. They then take down the Soviets and the Chinese, all while keeping the American people docile by continuously introducing new technology that makes their lives easier while they continuing to implement their agenda of global conquest. And since there's no constitutional amendment to limit presidential terms, their leader continues to get re-elected.
The main plot of the game would be about you going back to various points in history to undo the changes these time travelers have made. History changes based on the choices you make. A choice that may seem good could end up with disastrous consequences while "bad" choices must be made to restore the timeline. For example, these time travelers are using their future tech to help America defeat the Axis powers, so you might have to sabotage that effort, which in turn means allowing a lot more people to die.