RETRO6 essentially is a bundle of mods that makes the player think and work hard at making a base and living in such a way where your death is the least frequent. Farming is the most important part of RETRO6. With Spice of Life, you must make sure your farms are ever so plentiful, and your cupboards filled. Once your living quarters are created you may then go on the path of machinery and world domination! Or go a more magical path, drawing magic from flowers, nature, and even dark entities. Eventually you may notice that this world is not for you, and slowly making you want to leave. But death is not the only way to escape, you can build portals, rockets, and many other more advanced and late game constructs!
This is a modded server so you will need to acquire the client-modpack.
Visit http://siboroc.net and find the Launcher at the bottom. The rest is straight forward. Acquire the modpack upper limit of at least 4096MB is recommended