Probably, yes. But all that means is the specific game you were playing won't get the special Ironman achievement. You'd still be able to play on with that save in non-Ironman mode, or alternatively re-start a new game.My question to you is - What if I'm playing in Ironman mode, load up a save, play for few weeks, then boom CTD? If I try to load up that save again... The game recognizes that it'as already been loaded and is like "bro, no more ironman for you."
And honestly, Paradox games hardly ever CTD these days. Those times are past.