You can use
https://pcsx2.net/ ps2 emulator. According to compatibility, it runs UFC game for ps2 well. I have beaten Final Fantasy 9 using this emulator long time ago and had no issues. Since then pc hardware became more powerful and would run any ps2 game without any lag, bug or issue.
You know, it depends on how much you want to spend on playing UFC game without buying a console
You still need a controller, as playing on a keyboard isnt convenient. I can suggest to search on aliexpress for something like ps2/ps1 emulator HDMI stick (but it still will require a usb port on tv, laptop or pc for power). It will cost around 30-50 bucks and will come with a controller or two (but cheap quality).
However, if you really want to try UFC game, I would suggest buying preowned ps4. This will cheapest option for best experience. Old ps2 UFC games are primitive. High, low punch or kick, few combos or and sort of a hit 1 button to perform submission. It will be still more fighting of Street Fighter or Mortal Kombat level. PS4 level game has gone much further. More buttons, more combinations, submission and etc. It will be more than smash 1 button to win game.
I like what you are saying here I also am using a PS2 emulator and playing Valkyrie Profile 2 and many classic games that we can play on the PS2, for sure there is also a PS3 emulator that is now available, and a PS4 emulator that is on the works right now, for sure I think you can play PS2 emulator even in your mobile device, but it is really amazing if you are playing it with PC as you have said PC hardware become more powerful now, and would any games with the proper specs needed, as PC required a video card in smoothly playing those games, but yes it is surely a great thing if you are playing with a controller that resembles a PS controller, and I suggest there are low-cost wireless controller that you can buy online there is no product name but here is the screenshot of the product,
-snip-
Thanks but I dont want to be MMA manager or anything like Dana White, and I dont like all the fake name of the fighters and old graphics.
No problem dude, I wish I could help you and I also want to play those MMA games if there is a way for the PC, but for sure emulators are the only way around it,
We are having an event ONE Fight Night 18: Superlek vs. Mahmoudi next week, and I think it is good that people will see most of the fight of Superlek he is the favorite to win in this fight for sure here are the videos of Superlek Kiatmoo9
Here is the fight of Superlek Kiatmoo9 against Tagir Khalilov and yeah Superlek won this fight,
https://www.youtube.com/watch?v=W98IO6XHcRMHere is the fight of Superlek Kiatmoo9 against Rodtang Jitmuangnon and yeah Superlek won this fight aswell,
https://www.youtube.com/watch?v=kWL_JKkqWcw