Cracked
Etymology
Gaming slang that spread on Twitch and in online multiplayer communities in the late 2010s. The likely sense is that an unbelievably skilled player seems "broken" or malfunctioning in their own favor, echoing older phrases like "crack shot" for an expert marksman; the exact origin is uncertain.
adjective · /KRAKT/
Extremely, almost unfairly skilled — especially at a video game.
What it names
It names a level of skill so high it seems abnormal, as if the player were running on something other than ordinary talent — the good kind of "broken."
Example
That kid is absolutely cracked at the game — he was hitting shots nobody should be able to make.
Related idea
Close to calling a player op, but op usually describes an overpowered character or item, while cracked describes the person’s raw skill.