TLauncher 2.86 refers to a specific build of the TLauncher software, released around late 2021–early 2022. It was known for:
Once launched, you'll see a clean interface. Here’s how to configure it: tlauncher 2.86
One advantage of TLauncher 2.86 is its ability to join "offline-mode" servers. Here are popular ones (as of this writing): TLauncher 2