RLCraft
Install RLCraft from your favorite launcher and enter play.retg.net:29536 as your multi-player server.
Minecraft
1.12.2 (Wild West)
Search RetG on Technic and select RetG-WildWest-NewHorizons
Minecraft
1.7.10 (Wild West)
Search RetG on Technic and select RetG-Wild West Frontier
Minecraft
Wurm Unlimited
Download the game from Steam and enter play.retg.net:3724 as your multi-player server.
Project Zomboid
Download the game from Steam, and enter play.retg.net:27014 as your multi-player server.
Satisfactory
Download the game from Steam or Epic and enter play.retg.net:7777 as your multi-player server.