More and more adventure titles are starting to appear at the AppStore. Some are ports and some have been designed specifically for the iDevice. And though any is a welcome addition, not all live up to the high standards set by such great games as Broken Sword: Director's Cut and Jules Verne's Secrets Of The Mysterious Island. Today's review title, The Legend of Crystal Valley, is a port of a PC game released in early 2009. It's a reasonable effort to keep the die-hard fans entertained until the next major title, but probably not the game you've been waiting for.