Quoted from Glarrownage:That's really disappointing to hear. I've been really wanting to pick up The Shadow but I didn't realize it had such a shallow rule set.
I wouldn't stress on "shallow" or not, it has a great mix of gameplay with so many different ways to play.
I bought mine on the idea that it was so deep and was surprised within 2 days on hard I was at the final battle, however beating it is another story. If you time out the modes its fairly easy to get to final battle. 50+ final battle attempts, never beat it, got down to 1 shot to go, drove me nuts.