As BJ Blazkowicz a.k.a Terror Billy, you cut through hordes of Nazis in varied environments and use powerful guns to muscle your way through Nazi controlled America. The missions are varied and change dramatically. From Manhattan, to New Orleans to a mission on the planet Venus. The imagination is stretched to the maximum and is loads of fun. Some of the weapons like the laser beam get downright powerful.
In combat, you should take out the commanders first and stop them from calling in reinforcements. They drop enigma codes which you can use to decode the locations of other Nazi commanders which acts as side missions to the game. On your home base, the submarine, there's a computer where you can also play the old Wolfenstein 3D :)
The game is fun and story line is rich as you traverse through Nazi controlled USA. The weapons are powerful, but the boss fights are boring. The enemies you meet along the way are smart and they react brilliantly. The characters along side terror Billy on the submarine form the crust around the story line. Overall its a good addition to the franchise.