The Legend of Korra game story follows Korra as she battles various enemies. She uses her bending skills, like water, earth, fire, and air bending. There are different levels where she has to face challenges and protect the world from those who want to disrupt the balance of the four nations.
The main plot points include Korra's journey to master all four bending elements fully. Along the way, she has to face political unrest in the different nations. For instance, in Republic City, there are power struggles that she gets involved in. Also, her encounters with ancient spirits and learning from them are significant plot points. These events shape her character and her role as the Avatar. Moreover, her battles against dark benders who misuse their powers are crucial parts of the story.
The Legend of Korra comics are definitely worth a read. They capture the essence of the franchise and bring fresh perspectives. The quality of the storytelling and the visuals make them a great addition to the series.
The 'lemon' aspect might be a bit hard to come by in a clean way as it often involves inappropriate content. But for normal Korra and Mako fanfictions, you could also try FanFiction.net. Some stories there might show their relationship developing, their adventures together, and how they support each other, which can be really interesting to read.
To be honest, I don't have an exact figure. But you can look up on popular comic book databases or ask in comic book enthusiast communities to get a clear idea of how many The Legend of Korra comics are out there.