#gamespy

Emulator Prep: First off, you're gonna want the PCSX2 Nightly Builds. These make PCSX2 actually a good emulator. Thankfully it's right upfront on their site

Of course you'll also need the ISO for the game. I'm not sure if region matters but to be safe I'll recommend the vanilla NTSC version. Get this wherever you get your totally legally acquired PS2 games. Open Settings>Network & HDD, enable the Ethernet checkbox and set it to whatever network adapter you're using. You'll have the option for Packet Capture (PCAP) based options as well as Sockets. Personally PCAP Switched has worked best for me but your mileage may vary and I recommend jumping between em if one doesn't work. You'll need NPCAP (https://npcap.com/) installed for the PCAP options.

Tab over to Internal DNS tab and click Add to set the following shown in the image. The important part is having the DNS Address of 45.7.228.197 as this will connect you to PS2Online's OpenSpy server. Don't forget to enable the checkbox as well.

In-Game Stuff (Also applies for Real Hardware) First you gotta make your in-game profile if you haven't already. Then just go to the MK Online option in the main menu.

Select "Create Or Modify" when asked for a connection. This will open your Network Settings Menu. -From here proceed with the default settings until you reach the DNS setting. Set that to Manual then input the PS2Online DNS (45.7.228.197) and the secondary to 1.1.1.1 If all is well you should pass the connection test

Save the name and settings and you are officially connected to OpenSpy, the GameSpy replacement service. Exit out back to the BIOS and start the game from in the BIOS. Go back to the MK Online menu and select your newly made network settings. You'll see a login screen where you make your Online Kombat account and then you're good to go.

There's some hidden characters and stages at the start but those can be unlocked via krypt codes.