Yes, polymc supports mojang login. This patch [0] I tried to use to bypass login did not work -- I have to login with mojang to start the game on polymc. For m

Yes, polymc supports mojang login. This patch [0] I tried to use to bypass login did not work -- I have to login with mojang to start the game on polymc. For multimc there's a fork called ultimmc that allows playing without an account. Some servers do not require authenticated accounts and work in so-called "offline mode" where authenticity of usernames is not verified with mojang servers (created for playing on a LAN). Many servers on the other hand require usernames of connecting clients to be verified -- and this does not work anymore (at least for me) with the mojang login. wiki.vg has a large repository of minecraft protocol descriptions: [1] and [2] [0] http://ni.sijanec.eu/sijanec/n/tree/etc/portage/patches/games-action/polymc/crack.patch http://ni.sijanec.eu/sijanec/n/tree/etc/portage/patches/game... [1] https://wiki.vg/Legacy_Mojang_Authentication https://wiki.vg/Legacy_Mojang_Authentication [2] https://wiki.vg/Protocol_Encryption#Authentication https://wiki.vg/Protocol_Encryption#Authentication