@Daravae I did, but the only person to reply was the moderator in question, who replied with "seems like they changed it" (which they haven't,) I have found various source on youtube disproving that statement. He also goes on to say "...steam now doesnt handle it as older versions anymore. Instead they handle it as Beta now." (this is untrue,) At the time he ran the game (2018. 03. 23,) the version of the game he was running on (1.3.3, over a year old) would show as beta in steam.

Hello, Hearts of Iron 4 has a rule stating "No mods (Of ANY type,including music or graphics)," You can tell if the person has mods on by looking at the Achievements disabled icon on the bottom-right corner of the screen. One of the moderators for this game "survivalMichi" has achievements disabled for his "1st place" run (Achievements should be enable no-matter the version you're playing on, Unless you're playing in 1.0.0, which the icon does not show for that version.)

I just tested out your Hypothesis, Didn't work.

"Concur Poland - RT any%" 1st and 2nd place have achievements disabled, why is that?