For the RPG Pathfinder: Kingmaker the so called "Enhanced Edition" has been released:

The EE includes:

• numerous gameplay-enriching content additions and dozens of quality-of-life features
• new abilities and ways to build your character, including a brand-new class
• new items and weaponry
• improved balance, especially in the beginning and last two chapters of the game
• enhanced kingdom management system, both in terms of balance as well as usability and player comfort
• increased variety of random encounters on the global map
• thousands of fixes and improvements made since the game's initial release

The detailed changelog on Steam consists of three parts and contains plot-spoilers.

Also the (paid) DLC "Beneath The Stolen Lands" has been released on Steam and GOG.

• Enter a massive dungeon with a party made from scratch. Begin your adventure to the Tenebrous Depths with a party of newly created characters. Start the game from the main menu and experience the descent into an endless rogue-like dungeon.

• Explore the near-infinite possibilities of building a Pathfinder character. Try out different builds to perfect your tactics at your leisure. Create a band of adventurers able to overcome any danger!

• Defeat is but a new beginning! Dying in an encounter enables additional benefits for your next playthrough.

• Unlock new items to buy across multiple playthoughs. The number of item slots nearby traders have depends on how far you have been able to descend during all of your previous forays combined.

• ...or enter the dungeon as your main character. Alternatively, you can wait for an invitation from a mysterious protector of Golarion as you play through the Main Story. The preset version of the dungeon is included into the main campaign, allowing you to use your character and companions to conquer the Tenebrous Depths.