Like most game series there must be a bad apple in between,but this is rotten decayed apple and here is why !!
There were repeated and recycled faces, all enemy characters of same ranks looked the same,AI was not that great,Some enemy units may run into u without shooting or pause for a while without doing anything and when you switch characters the unused character doesnt play any vital part,just stand still I think.
The stealthy part doesnt rise to games like thief, I made stealth kills right beside enemies without hearing the action or at least notice the absence of the victim.AND SO FAR U DONT MOVE OR HIDE BODIES,BODIES DISAPPEAR WHEN THE SPY TAKE THERE CLOTHS.
Further more u play with 3 main characters only (Green Beret-Spy-Sniper)
Where the Heck are the other guys,In the last mission of commandos 3 all the characters were available and it was a massive blast.
There are lots of other bad stuff to mention but I guess thats enough for you guys out there to think carefully before buying the game.
The only exception is if you have played every historic 1st person shooter ever known and desperately looking for something new(different)