On November 23, over 68,000 Steam users played Hearts of Iron IV at the same time. This is the new best metric for playing on the Valve court. On November 24, the peak online was 61 thousand people, which is also higher than the previous record of 46 thousand. Statistics were provided by the SteamDB portal.
The surge in popularity of Hearts of Iron IV came with the release of Not One Step Back, an add-on dedicated to the Eastern Front. DLC significantly expands the gameplay for the USSR, Poland and the Baltic countries, and also makes changes to various game mechanics.
Hearts of Iron IV was released in June 2016 on PC. The average game rating on the review aggregator is 83 out of 100 from the press and 7.5 out of 10 from users.