Mentality
The mod configurations are left in their original state - minimal adjustments are made. This is meant to preserve the intended balance of each mod. All of these mods are of very high quality and has developed over extended periods of time with plenty of player feedback.
The intention is to never be forced to start over, unless YOU choose to do so. If a new mod with content that requires world generation is added you will be able to access the new content by generating new chunks in your world (as you would in vanilla Minecraft).
Featuring
(Listed in alphabetical order.)

