Batman: Arkham Asylum is really a masterpiece. The game has no influence of the recent Batman films but is, infact, completely based on Batman comics.
The voice acting and cutscenes are top notch. The villians and Batman have been really well portrayed and are true to the comics.
You will encounter some major villians such as Killer Croc, Harley Quinn, Poison Ivy and ofcourse The Joker who is the central character in the game. The conversation between Joker henchmen is also interesting and you can feel their nervousness when their companions are dispatched silently by the Dark Knight.
One of the shortcomings of the game is that it becomes easy when using detective mode and you are often required or rather tempted to use detective vision. The encounters with scarecrow are also interesting.
The audiotapes scattered throughout the asylum helps to better understand the mental condition of the inmates. The hand to hand combat is really really good and every mission completed, trophy found, henchman dispatched gives experience points - which enable access to better gadgets, stronger armour, improved takedowns etc.
Overall, an excellent game with really good graphics, decent story and satisfying hand to hand combat. Must buy for Batman fans and highly recommended for all gamers out there looking for a quality title. The game also has decent length and will take minimum 10-12 hours to complete.