Skiller

Skiller stands for the word "Skilled". So when someone calls himself a "Skiller", it usually means that someone or the person himself has played particularly well and stands out from the other players as an elite player.
Someone is a "Skiller" if he belongs to the elite. A person who is skilled in games, with a minimal amount of time investment.

"He is really a Skiller in this game."

Skiller

Skiller stands for the word "Skilled". So when someone calls himself a "Skiller", it usually means that someone or the person himself has played particularly well and stands out from the other players as an elite player.
Someone is a "Skiller" if he belongs to the elite. A person who is skilled in games, with a minimal amount of time investment is a "Skiller". This is not bound by any specific game.

"He is a true skiller in this game"