It is not often that I get sent a copy of a game that I already know I really like. In fact it has happened exactly once. Sentinels is that game. I have played so much of it over the past few years, it is almost mind boggling, and the release of a very good app version has allowed me to play even more. So there will not be many surprises in this review as to the things I like, but hopefully, it will help you decide if it is for you as well.