Requires the library mod Hybrid.

First Join Message is a mod (a Hytale Java plugin) that can be used in servers or mod collections. It can be configured to send a message whenever a player first joins a world. Alternatively a message can be broadcasted to the entire server. Or both.

Create immersion, let players know what your server and collection is about! Or let all existing players know that someone new has joined.

The messages can have any colour via the RGB config values. %username% can be used as an input, which is replaced with the player's username.

Configurable: ( how do I configure? )
firstJoinMessage (default = "You wake up in an unfamiliar place.")
firstJoin_R_rgb (default = 0)
firstJoin_G_rgb (default = 170)
firstJoin_B_rgb (default = 0)

broadcastMessage (default = "")
broadcast_R_rgb (default = 0)
broadcast_G_rgb (default = 170)
broadcast_B_rgb (default = 170)

Showcase:
Here the player is sent a message when they first joined the server:
The message can be changed via the config.

You can use %username% in the config input, which is replaced with the player's username:
firstJoinMessage = "%username% wakes up in an unfamiliar place."

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You may freely use this mod in any mod collection, as long as the download remains hosted within the CurseForge ecosystem.

Serilum.com contains an overview and more information on all mods available.

Comments are disabled as I'm unable to keep track of all the separate pages on each mod.
For issues, ideas, suggestions or anything else there is the Github repo. Thanks!