Crusader Kings 2 is regarded by many players as one of the Crusader Kings 2 than now, as it currently sits free to with all of its DLC marked down in a massive sale by 50%.
Crusader Kings 2 has been completely free to play for a while now, meaning that you can the base game and keep it in your library forever. Do keep in mind, though, that this whopping deal includes the base game only. Thankfully, all of the DLC is currently half-off on GOG. You can get any expansion you want for 50% cheaper, or opt to get collection bundles containing a multitude of additional content. For instance, the Dynasty Shield Pack is available at half its usual price, and it comes with a few different features.
I may not spend much time in strategy games myself, but I know a good free game with well-priced DLCs when I see one. As someone with a love for all things medieval history, Crusader Kings 2 definitely has its unique appeal. Since the price of the DLCs on GOG is pretty low thanks to the discounts, I am going to be grabbing a few myself.
You can the critically acclaimed medieval game Civilization 6. A break in the Middle Ages from commanding my naval ships as Queen Elizabeth would be good for my brain.
Players online have given the game very positive ratings overall, with the developer describing it as an experience in which "The Dark Ages might be drawing to a close, but Europe is still in turmoil." If you feel up to the task, you can hop into the gloomy European setting mid-Crusades and test your power as a medieval lord. Crusader Kings 2 can be set at any point between 1066 and 1337, and you can play up until 1453 as a (not-so) humble Christian leader.
If you love gameplay experiences that make strong use of your brain, be sure to have a look at our list showcasing the best war games to channel your inner soldier a little bit more.