Assassins Creed is an open world sand box game that will blow your mind!
The fighting is open and tactical, you can be stealthy or just barge in. But the game encourages you to choose the stealthy path due to its synchronization feature. Your wide range of abilities allow you to adapt to any situation and the new renovation system as well as the territory system improves upon AC2's. When you've completed the main story you can go in and free roam. Nothing feels as good as running through a restricted area unseen dodging guard after guard killing them stealthily along the way. The epic battles you face are fun and will keep you on your toes. Assassins creed has always done a great job making climbing easy and seamless. The new lift system makes this an even faster paced game when chasing someone or fleeing from enemies.
But the single player is just one part. ACB includes a multiplayer feature where you'll kill and be killed by other players. This experience is award winning and fast paced. With each game you'll gain experience to level up. With each level comes new powers, equipment and perks.
In short this is one game you will want to get.