What are the best games on Steam with a focus on horses?

Throughout the story of the game, the player will be trying to rebuild their private military which was lost in the epilogue of the previous title in the MGS series. Other than building their "Mother Base" which is an ever-evolving giant structure which serves as a base of operations for

Metal Gear Solid V gives players multiple choices on how to approach a mission or clear an outpost. For example, the player can choose to use stealth and cunning in order to complete their mission and kill only when it's absolutely necessary, or they can get in guns blazing and kill every sin...

There is some frame drops during gameplay but the main target of 60fps is more often reached than not. V-Sync is used, so there is no screen tearing and everything plays at a native resolution of 1920x1080.

Definitely not one of the best looking games out there, and age is not helping it either.