Fantastic game, especially for comic book lovers.
The game is great even if it's just based on the Arkham island. Batman's skills/manuvores for combat really blew me away with the amount of variation you can input into one combo if pulled off right. The game provides a great deal of missions whether they require you to master the true skills of being a stealthy killer or just you trying to figure out where/how to get into that building or sort out the problem that your faced with.
The graphics on the game are spectacular. Even the city of gotham off into the distance is done in great detail. The voice-overs of The Joker, Batman and more are very good as well. The only problem with the game is that you are always half tempted to stay in detective mode the whole time. This brings you away from the amazing graphic production of Batmans enemies and scenery.
The main storyline is simple however keeps you wanting to play more and more. The additional combat missions once you completed the game are also good however I could never do that great in them.
For people who love action/adventure games I would highly recommend this to them! Also people who like comic book games/movies as well as this will not disappoint you!