A "One City Block Stealth Action RPG" like the one described by Warren Spector but with a big emphasis on the stealth aspect. Basically Die Hard X Splinter Cel

A "One City Block Stealth Action RPG" like the one described by Warren Spector but with a big emphasis on the stealth aspect. Basically Die Hard X Splinter Cell Set in one highly simulated skyscraper where you approach the game how you wish with fighting mechanics like Sleeping Dogs (environment interaction) and immersive sim possibilities