I did my best to base it on the movie.

You are officer John Mclane whos on his christmas vacation and gets invites to a party with his wife at the nakatomi plaza. Terrorist take hold of the buiding and you are the only one who hasnt been catured or killed. make your way throught the building attacking many terrorist and try to contact the police and FBI but you have to take matters into your own hands when back ups a little late.