A complaint I had often heard about difficulty levels is that <a href="http://www.ntsearch.com/search.php?q=people&v=56">people</a> just set it at easy or turn on invulnerability and breeze through the game in a few days. Kills the enjoyment and sense of accomplishment. Invulnerability is especially bad. It does nothing to break in rookies but teach them poor tactics. I was a victim of the WCIII invulnerability "syndrome," and when I decided to play it fair, my combat skills were lacking and I flew carelessly. And there's no real need for difficulty levels. Just make the game progressively harder. If you're new and need <a href="http://www.ntsearch.com/search.php?q=training&v=56">training</a>, use the simulator. If the Terran Academy was real I <a href="http://www.ntsearch.com/search.php?q=bet&v=56">bet</a> you the simulator there wouldn't have an invulnerability option. WC Academy didn't have an invulnerability setting, though it did have a difficulty setting for obvious reasons.