Both deal with gaming.

Both shows has some common points like dealing with teams and comradeship.

But king's avatar deals mostly with only gaming and nothing else specially no romance...

Cross fire has other elements like sci.fic

Both are based on team games and comradeship

They deal with teams their progress in building trust, relationship

Gank your heart has very good bromance and beautiful chemistry between ML and SML ....

It's is spinoff of unclean realm's story of The Untamed.
Story revolves around the Nie Ming Jie and Nie Huai Sang.
Their relationship as half brothers and the story what happens in the time line of 16yrs from Wei wuxian's death to reincarnation as mo xuan yu