The original Toy Soldiers was one of the first games with the now-standard 1200 Microsoft Points price tag, and to date it's still one of the select few games that was actually worth its price. With its "take control" twist on the tower defense formula, it offered plenty of levels and even a full new game+ mode to let you play as the Germans.
Signal Studios has taken the concept of the World War I tin soldiers playing out their little war, and applied it to the Cold War era for its sequel Toy Soldiers: Cold War. Instead of this just becoming an Army Men defense game, however, the result is more like replacing the old WWI soldiers with G.I. Joe toys and loving every minute of it.