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It is mandatory to use fixgamplaybugs in 2.98f, and in 3.0 – it’s up to the player’s discretion. If I could participate, I would still play on 2.98. The maphack is easily checked; rarely will anyone use two computers for this, but it does happen. All that’s needed is to press F2 several times during the game. If a copy of the game is not running and/or the editor is not open, it will display “Ok”; otherwise, it will indicate that it is running. This is enough to screenshot and immediately submit to the judges.