this game isn't perfect by any means but it has no right to be as excellent as it is. they didn't have to make blazkowicz a richly nuanced character who gets to be tender and sweet as well as a badass nazi-killer, but they did, and the game is so much better for it.
gunplay feels great. level design is pretty darn good (not without its rough patches; play on easy imo). writing and delivery is stellar. just a real fucken triumph of a videogame.