Play Horizon offline.
A nickname instead of a session.
The xHorizon launcher can download the official Mojang 26.3 jars and prepare Horizon without a Microsoft session. After that it starts offline under a nickname you choose.
Official Horizon client: github.com/horizon-rust/horizon/releases. The xHorizon launcher downloads it for you.
How to turn it on
Download official 26.3
Open Diagnostics and press Download 26.3 & prepare. The launcher downloads the official Mojang jars, verifies their SHA-1 and prepares the game files itself.
Enable offline mode
Open Settings, choose Offline, and switch it on. Pick a nickname of 3 to 16 letters, digits or underscores.
Press Play
The launcher starts the selected profile without a Microsoft session. Worlds, options and screenshots stay in that profile.
What changes
Servers
Servers that check a licensed account reject the nickname. Singleplayer, LAN worlds and servers running in offline mode accept it.
Skins and capes
The account's skin and cape are not sent; other players see the default look.
Account
The Microsoft account is not used during an offline launch. Turn offline mode off to play on signed-in servers again.
Updates
Updates are installed by the official Horizon launcher, not by offline mode. Update there, then start offline again.
Questions this page gets
Is this a cracked launcher?
No. The launcher downloads the official Mojang 26.3 jars and the official Horizon client. Offline mode prepares those files without a Microsoft session; it does not ship a modified game.
Do I need to sign in every time?
Sign in once and prepare the game. After that, every launch runs without a session file while offline mode is on.
Can I join a friend's server?
Only if that server also runs with account checks off, or accepts the nickname without a Microsoft session. Public online-mode servers will refuse the login.
Will my worlds and settings stay?
Yes. The profile folder is the same one the signed-in launch uses: saves, options, shaders and screenshots stay in place.
Does it work with packs?
Yes. Offline mode starts the selected pack with its own mods and native build. A pack that was never built still needs its normal install first.
Turn the session on only when you need it.
Offline mode is a launch option inside the launcher, not a separate build. Switch it off and Play uses the signed-in account again.
Offline mode starts official Mojang 26.3 files without a Microsoft session. The launcher downloads the jars and the official Horizon client; it does not include a modified game. Terms.