Just an idea as I play through these campaigns, not sure how hard it is to implement: Add an ironman mode and some steam achievements that are unlocked through playing ironman mode
Ironman mode if you dont know what it is, refers to a game mode that restricts the players ability to save the game down to one save only, and sometimes only at specific times e.g at the beginning or end of a scenario. This prevents making multiple backup saves. I could think of a few ways to implement this but my primary intention with suggesting this is to make the most out of my favourite feature of this game: The random multiple enemy battle plans. If there was a system where I could be rewarded from attempting to complete a campaign against random battle plans for each scenario with no chance to reload from backup saves, that would be enticing for me but maybe for no one else

Along with this it would have to be something implementing the random battle plans only with no option to pick BPs
I want to be able to challenge myself and compete with my friends for getting those max rank campaign runs, but I can see that its pretty easy to cheese the AI if you just make a lot of save games. I know I dont need a system or steam achievements to do this, but cmon devs, appeal to our show-off side!
Just an idea
