Brilliant execution, fantastic gameplay and amazing graphics! A must have! Save system not that bad!
However, let me address a common complaint about the save system. The fact is that you only get one save file per profile, which limits you from restarting at a previous point. BUT, that doesn't necessarily mean it's a bad save system; IMO, it adds a certain element of strategy to the game, forcing you to think twice before saving. For instance, since your missions are timed by the in-game clock, saving right before a mission expires will mean restarting at that point makes it difficult to complete the mission before time's up.
However, the game allows you to save at very opportune times and personally I have never had a problem with the above scenario. Instead I plan ahead, which greatly improves the experience of the game.
The game itself, as you've probably heard, is about a photojournalist named Frank who gets dropped off at a mall full of zombies in hopes of uncovering the reason of the zombie outbreak. I won't get into the story, but instead will explain how absolutely INCREDIBLE the gameplay is. In the mall, EVERYTHING is a weapon. You can literally pick up almost any object in the game and use it to fight your way through swarms of zombies. Guitars, plant pots, cooking oil, katanas, lawnmowers, chainsaws, frying pans (which can be heated to fry zombie faces), shower heads (which you pop into a zombie's head, causing blood and brain matter to shower down upon your victim), bowling balls; the list is literally endless. And of course there's a plethora of firearms you can use to pop some zombie skull. It's amazing how much detail went into the object system of the game, as many of the weapons have multiple uses as well.
The in-game time system is very amusing as well, as you can witness the entire day from daybreak to sunset in a very believable way. During the day the sun is bright, the zombies are lethargic, and elevator music plays throughout the mall. At night, the zombie's eyes turn red and become much faster, the lights in the mall (which must be on a timer) eventually turn off, leaving you in almost total darkness, and even a recorded message plays on the overhead loudspeaker announcing the closing of the mall (not that any customers are around to listen.) The level of detail is astounding.
You also have a LOT of flexibility to do whatever you want in the game. You can choose to tackle the scoop missions, which are given to you via a walkie talkie from a friend; you can choose to escort survivors from varying parts of the mall to the safety room, or not, essentially deciding who lives or dies; fight the psychopaths who have gone insane from the terror of the zombie crisis, a combination of all of that, or you can choose to just simply run around killing zombies to your heart's content. It's all up to you!
Seriously, this game is just a lot of fun for anyone with a penchant for zombie mayhem. Although quite different from Capcom's Resident Evil series, the survival mechanism is still quite prominent, and if you're into survival horror, then I am certain you will love this game as much as I have.