I used to play this a lot when I was younger, so I was positively surprised to find out GOG has a version that goes with windows 10. The game is prime realist tactical shooter action, you can't just rush around spraying with automatic fire and succeed. You need to play it safe and smart, think before you act. You also can't just shoot anybody. If you are one of those ADHD kids who need non stop action this game is not for you. Ps. I found out there are really nice mods for this game. I HIGHLY recommend getting SWAT ELITE FORCE and BFHL mods, they go together and make the game look and feel so much better.
