I'm sure I read somewhere on this site that mods and admins considered this game complete without getting those two achievements. They are not skill based, and are now pretty much unobtainable due to how people have padded their stats beyond the realm of anyone who wished to play legit. Only hope would be a monthly leaderboard reset.
A few older games had leaderboard achievements (Quake anyone? good luck even finding a game, never mind getting anywhere near the top) but thankfully these sort of achievements have been fazed out.