Stratego is a war game, but involves hidden ranks, unlike most others.  The goal is to get the flag.  Both players set up their army of 40 pieces, hidden from their opponent's view.  Players move, battles being one by the higher ranking man.  There are bombs, which can only be diffused by miners.  Spies can defeat marshalls.  There are 12 ranks / things in all.  The set up allows for several strategies.  You can create a decoy flag, put your higher ranking men in front, whatever.  This game is unpredictable because of the various strategies and easy to learn.  I suggest this for anyone who likes strategy board games.