I recently got Tubi and I love it. If you don't have it then get it. It is a free streaming service (free due to commercials), but it does have a lot of older shows and movies. As someone who loves pre-woke British stuff they have a lot of that as well.
They have some anime and that is how I saw Fist of the North Star. I really enjoyed it. I am wondering was that based on a Manga or was it a totally original movie? I'd love to get more stuff related to it. Any recommendations for similar anime?
You can use MAL to search for an anime or manga. It also lists prequels, sequels, specials, alternative versions, and what it's adapted from (like a manga). This is a search for it's Japanese name https://myanimelist.net/search/all?q=Hokuto%20no%20Ken&cat=all. You can search the English also https://myanimelist.net/search/all?q=Fist%20of%20the%20North%20Star&cat=all
There's a 1984 TV show (with over 100 episodes), some 1980s movies, and some 2000s anime.
In additional to the games mentioned in a different reply, you might want to look at God Hand (PS2). It's not a Fist of the North Star game, but people who like the series might enjoy it as well.
I really appreciate it. Thanks!
I forgot to mention it, but there's also recommendations by users: https://myanimelist.net/anime/967/Hokuto_no_Ken/userrecs
The 2nd recommendation there, the first Berserk is a classic. Disregard the 3D follow ups.
You can also search by season of release, going back decades: https://myanimelist.net/anime/season/1984/fall
Greatly appreciated