Mount and Blade: Warband.

Seriously I cannot stress getting this game enough. It's $20 on Steam and I've had hundreds of hours of fun.

It feeds my hunger in gaming for a hand-to-hand medieval combat. You can level up your character, become a merchant, improve your armor, weapons, and horse, control an army, become a king of your own faction, and conquer all of your enemies, but you start out as a nobody and have to earn your right to rule in the world.

Check out the trailer: https://youtu.be/sX37QA9o-Co

If you're a graphics whore, then it might not be for you, because it is kind of an old game, but the second game of the series SHOULD be coming out soon with updated graphics.

With anticipation for the second game's release M&B II: Bannerlord, right now would be the perfect time to learn the controls and feel for the game if it is for you, because it has a very steep learning curve. I'm an avid gamer and it took me forever to learn how to not get taken as prisoner by bandits.

Here is a gameplay trailer for Bannerlord: https://youtu.be/LmX5DFgRBXk