The steps detailed below will provide you with the needed steps to set up your Space Engineers Server Hosted By Host Havoc for crossplay.
1. Log into our game control panel and access your game server.
2. Stop your service.
3. Click the "Configuration Files" icon.
4. Click the "Configuration Editor" tab beside "SpaceEngineers-Dedicated.cfg"
5. Scroll down to the very bottom of that configuration file and locate the "=== Crossplay/Networking ===" section
6. Check off "Enable Console Compatibility" and set the Network Type to "eos" and then scroll back up and save and exit.
If you are using Torch you will need to change "Enable Console Compatibility" from "No" to "Yes" via the "Config Editor" for the "Torch.cfg" file.
Connecting from Steam to an Xbox Space Engineers server:
From within the server browser in-game, click on the EOS filter in the name search bar and then search for the server.
Starter Worlds:
Alien Planet (PC) (NO CROSSPLAY)
Alien System (Xbox) (CROSSPLAY)
Crashed Red Ship (CROSSPLAY)
Dead Drop Arena (CROSSPLAY)
Distant Moons (CROSSPLAY)
Earth Planet (PC) (NO CROSSPLAY)
Empty World (CROSSPLAY)
Green Station (CROSSPLAY)
Home System (CROSSPLAY)
Lone Survivor (CROSSPLAY)
Mars Planet (PC) (NO CROSSPLAY)
Moon Base (PC) (NO CROSSPLAY)
Red Ship (CROSSPLAY)
Rival Platforms (CROSSPLAY)
Star System (PC) (NO CROSSPLAY)
Learning to Survive (CROSSPLAY)
Lost Colony (PC) (NO CROSSPLAY)
Never Surrender (NO CROSSPLAY)
Scrap Race (PC) (CROSSPLAY)
Sparks of the Future (PC) (NO CROSSPLAY)
The First Jump Mission 1 (CROSSPLAY)
The First Jump Mission 2 (CROSSPLAY)
The First Jump Mission 3 (CROSSPLAY)
The First Jump Mission 4 (CROSSPLAY)
The First Jump Mission 5 (CROSSPLAY)
Earth Planet (Xbox) (CROSSPLAY)
Mars Planet (Xbox) (CROSSPLAY)
Moon Base (Xbox) (CROSSPLAY)
Scrap Race (Xbox) (CROSSPLAY)
Sparks of the Future (Xbox) (CROSSPLAY)