The use of OPMode is widely considered cheating in the HaxBall community. Because HaxBall relies on client-side prediction, a player using OPMode can appear to "flicker" or "shake" rapidly on the screens of other players.
Because HaxBall is a Flash/HTML5 game played in a browser, players often use "Hax" clients or browser extensions to gain an unfair advantage. opmode haxball
[SYSTEM] — OP_MODE_HAXBALL — ENABLED The use of OPMode is widely considered cheating
He never knew if it was a prank, a secret beta, or something else entirely. But he knew one thing for sure: once you’ve touched the ball outside of reality, a normal goal just feels… empty. a secret beta