Definitely worthwhile
I first had the demo, which I did find tough and challenging. But once you get the hang of the game, it's real fun. In fact, this is one game you can think of completing, even though it might seem to overcome a newbie. Plus, you'll really feel triumphant at the completion of certain missions.
Every mission is different from the other. From invasion to holding post, assault to defence, and exploration to rescue, it's one strategic action packed compilation...now that's a term which you don't use quite often.
The idea of a time freezing map to set strategic movements simultaneously is innovative. Even the idea of taking more than one person into a mission is cool.
The graphics are okay, or maybe just enough. The sounds and special effects are satisfactory. The music and the character animation are good. Handling of the game is a bit unstable, but way better than many other games of the same category. This instability is because of the inventory and the navigation of the soldiers, both on the map and on the ground. But that wouldn't be a problem after a few hours of playing. Considering the levels, they are beautifully done up. But to start with a night mission, and the fact that one of the first missions (the third one to be precise) is in pitch black, may make some beginners go crazy. You may have to raise the gamma and brightness to get thrugh the third mission.
With all things said, Hidden And Dangerous is one game that should be tried out.