I loved the original Fate when it came out, it was instantly one of my favourite PC games. It was a casual game which I could play for ten or twenty minutes and then save without worrying about finishing a level, getting past a plot, or getting to a safe place. It also was a casual game that wasn't a puzzle game or matching game. It was a casual RPG that was simple and actually very relaxing to play. I was instantly hooked on it. I played the original Fate at least three or four times through before the first expansion, Undiscovered Realms, came out. I bought Undiscovered Realms during the first week it came out, and though I still loved it I was disappointed. I loved that there were some new quest types, and there were new monsters and three new dungeons, but that was all that was new, and considering that the dungeons in fate are random every time you go through them it's still fun going through the same installment of the game over and over. I still played Undiscovered Realms, and loved it, but it wasn't what I had been hoping for.
Fate: The Traitor Soul, however, is more what I was hoping for in a new installment of the Fate series. Not only does it grant access to all of the previous dungeons and gives you a synopsis of each of the installment's storylines, it also features another new dungeon, as well as new equipment, new spells, new pets and new races to choose from. Part of what I love about fate is it's customize-ability. Your character's appearance changes when you change their equipment, as well as you can choose, albeit from a limited selection, what their base looks like. And beyond that with the addition of the new races it also added in a new challenge: learning to play as a character that starts off at being good and bad at certain things. And so instead of always starting with a blank slate character you are given specific advantages and disadvantages which you have to learn to work with as you play the game.
Beyond those changes they also changed some of the basic interface. You can view in any realm what quests you have in any other realm. Your storage is accessible from any of the realms, meaning you don't have to constantly jump between realms to find out which storage chest you left your items in. Your pack also now has an auto sort option, which can be very helpful so that you're not having to spend a lot of your time organizing and reorganizing your pack. As well your pet can now carry at least three times what it used to be able to carry, meaning you can travel longer before going back to town, and you don't have to send your pet to town nearly as often. Your pet's inventory also has an auto sort option. The maps are a little neater, as well they better indicate where things are, making it easier to find who has quests for you and who doesn't in town, or where important things are in the dungeons.
The game is still basically the same, but the content added in The Traitor Soul really adds to the gaming experience. If you wanted to you could go through and play as a human and play it as if it were still old fate. Or you can check out all the new content and see what the realms have to offer you.
I recommend Fate: The Traitor Soul to anyone who loves a good dungeon crawl, or to people who love the style of RPGs but are short on time. It's a great, simple, casual game that's fun to play for hours on end or for just fifteen minutes when you have time.