Myth: The Fallen Lords Codes -

Level select:
Hold [Space] while selecting the "New Game" option. Any individual level may be selected for game play.

Win single player level:
Press [Ctrl] + [Plus].

Lose single player level:
Press [Ctrl] + [Minus].

Taunt opponents:
Select a unit to modify, then press T during game play. At random times, a cheer will be heard.