That is Wolfenstein II. A collection of perfected game elements built on an only slightly unsteady base. Do not let that worry you, but maybe turn the difficulty down if you are having a hard time. There is more that I have not fully explored, a series of side missions that reuse maps in odd ways, showing MachineGames have the intelligence to not overfill their main offering, but to give you a new perspective on it. I am also yet to entertain a whole other timeline which changes the plot, a further examination of the characters, and a gun that provides a second flavour that should complement what is already an incredible meal.
Legacy of the Void, in true Blizzard fashion, doesn't break astounding new ground but does build expertly on what's come before. With an ending so ridiculous I couldn't help but love it, including three of the finest levels ever put in a strategy game, and a plot that never lets up on twists and went brilliantly unspoiled in marketing materials thus far, I don't know how else I would have put the series to rest. No matter your experience with the RTS, StarCraft 2's campaigns are only matched for value and fun by one another.
For a certain crowd of challenge gamers and speedrunners, this is your new devotion. You'll laugh and cry and swear and, I hope, create works of beauty through world records and live runs. For the rest of us, you'll need to judge whether the incredible style, absolutely extraordinary soundtrack and stellar highs are worth the lows that will make you want to snap your keyboard in half.