I have read this and I would like to ask you, if there is any way to do something similar with Technic launcher? I mean I would like to play with a friend on one account on a multiplayer server running on my other PC.

I understand why and how to turn off the online-mode but I have not found any file in which I could change my username or something like that.

Thanks for any advice.


You both should have your own accounts.

Setting the server to online=false is dangerous and really discouraged. If your server is accessible from Internet, you should never set it that way. So only if you don't have access to internet (like LAN playing somewhere in the middle of forests), you can set it to online=false, because otherwise you won't be able to play.

Also, changing display name is not enough since 1.7.10 and later. The game uses now UUIDs rather than player names, those are bound to Mojang accounts and are allocated on client login/launch. The launcher sends your credentials and password to the Mojang servers and if correct, servers will send back your UUID and session token. Launcher then can send the request to get the player name with using the UUID. The server then uses UUIDs all over the place, only for few things (those visible) are names used. Server takes the UUID and translates it into names using same method, asking the Mojang servers.

For changing your login name(or playing for 2 names without 2 accounts), you would need to use cracked software, that is again discouraged and dangerous for your computer and credentials safety and won't be helped you with.

  • Thank you, the modpack - Tekkit main - which I want to play is version 1.6.4 - lower than mentioned 1.7.10, so even though there is no way how to do that?
    – cubicap
    Dec 20 '16 at 16:01
  • @cubicap It is discouraged for all versions. Having own copies of the game is really useful to avoid all those technical issues. Dec 21 '16 at 16:50
  • This doesn't answer the question.
    – pppery
    Jul 8 '19 at 1:50

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