Finally got around to playing this after hearing so much about it, and it was as good as everyone was saying! Combat had plenty of depth that I'm not knowledgeable enough to talk about in length, but even with what I knew it was incredibly satisfying. The dynamic difficulty felt really good, and did its job giving me a constant challenge throughout the game. Story was the perfect amount of stupid, and although I didn't find much of the music memorable (apart from the credits) it still sounded good. My only major issue is some levels being a bit annoying to get through, and some general issues to do with the age of the game (I understand that it's important to the combat, but the tank controls can still feel awkward at times.)
Overall really glad I played this though! Decent chance I'd raise the score to a 10 eventually.