Install and Connect the Crystal Legacy Client Modpack

Download the Crystal Legacy client.mrpack, import it into the Modrinth App, point it at your server, and launch with Java 21.

The Crystal Legacy client ships as a self-contained Modrinth modpack (.mrpack). It includes every required Fabric mod, all resource packs, and a pre-configured title screen that connects you to your event server with a single button. Setup takes only a few minutes: import the modpack into the Modrinth App, point it at your server’s address, and you are ready to play.

The Modrinth App is the recommended launcher for Crystal Legacy. It handles Java 21 installation and instance management automatically. Other Fabric-capable launchers (MultiMC, Prism Launcher, ATLauncher) can also import .mrpack files, but the Modrinth App provides the smoothest experience.

Requirements

Resource	Recommended
Java	21
RAM	~8 GB allocated to the instance

Download

Download client.mrpack

Grab the latest Crystal Legacy client modpack from Google Drive.

Setup Steps

1. Import the modpack into the Modrinth App

   Open the Modrinth App, then add the downloaded client.mrpack file as a new instance:

   1. Click Add Instance (or the + button in the instances panel).
   2. Choose Import from file and select the client.mrpack you just downloaded.
   3. Wait for the launcher to finish downloading the mods and resource packs. Once it completes, the instance is fully installed and ready to launch.

   In the instance settings, allocate at least 8 GB of RAM for the smoothest experience.

2. Point the client at your server

   The title screen’s Play button is pre-wired to connect to a server address stored in a FancyMenu layout file. You need to replace the default localhost:25565 placeholder with your actual server IP and port.

   Open the installed instance folder from the Modrinth App (right-click the instance and choose Open Folder), then open the following file in any plain-text editor:

   /config/fancymenu/customization/title_screen_layout.txt
   

   Search for the line containing joinserver. It looks like this:

   title_screen_layout.txt — before

   [executable_action_instance:<uuid>][action_type:joinserver] = localhost:25565
   

   Replace the address after the = with your server’s IP address and port:

   title_screen_layout.txt — after

   [executable_action_instance:<uuid>][action_type:joinserver] = 203.0.113.42:25565
   

   The <uuid> portion of the key is a unique identifier generated when the layout was built. Leave it exactly as-is. Only change the value to the right of the = sign.

   Save the file and close your editor.

3. Launch the game and join the event

   Start the instance from the Modrinth App. Once the title screen loads, click the Play button and Crystal Legacy will connect you directly to the configured server address.

   If the server is in the WAITING_PLAYERS phase, you will be placed in the lobby automatically. If an event is already in progress, the server will sync you to the current phase so you can join without missing a beat.

Troubleshooting

If the Play button produces a “Connection refused” error, double-check that the IP address and port in title_screen_layout.txt are correct and that the server is running. You can also add the server manually via Multiplayer → Add Server as a fallback.