I really love the Mount & Blade series, it's really fun to insert yourself into a feudal economy and go from a traveler from an unknown home to a vassal, bandit lord, or a even a king of your own kingdom in the war torn land of Calradia. Taleworlds have made a sequel to Mount & Blade: Warband, Mount & Blade 2: Bannerlord. Check it out i really enjoy games like this a lot and i don't see any other game doing this.
PC Gamer Weekend Demo/Presentation of Mount & Blade 2: Bannerlord: https://youtu.be/bbrnPtybNd4
Mount & Blade: Warband on Steam: http://store.steampowered.com/app/48700/
DLCs (Made by modding communities/Gaming Studios with some level of collaboration with Taleworlds)
Viking Conquest: http://store.steampowered.com/app/321300/
Napoleonic Wars (Multiplayer only DLC): http://store.steampowered.com/app/48705/
Mount and Blade: With Fire and Sword (Standalone from Warband): http://store.steampowered.com/app/48720/