With few major changes from the core formula, fans of the series will feel right at home with Valkyria Chronicles 4. The game changes enough for the better and offers some degree of fresh air to the experience even after four entries. Any flaws that were present in previous titles still exist to some extent, holding it back from true greatness, but the general formula is more than solid enough and stays fresh despite the '4' in the title.
With City of the Shroud, the premise is far better than the execution. The five different sides of the story is by far one of the best parts but is buried far too often in meaningless fetch quests and mediocre writing. The combat system would be better served if it was turn-based and deeper, as spamming is simply far more effective and not particularly fun.
Despite the additions of the other systems, Warstone TD at its root is a tower defence. The systems are actually a great addition to the usual formula, but it is not deep enough to entertain players of other genres. The levels eventually become so long that unless someone is a die-hard TD fan, they will start to lose interest, which is one of the only major complaints.