Serilia is a mod under development that adds 2 new planets with linked campaigns, Ahkar and Caliterra, where you'll have to travel between these planets to research necessary blocks/items to progress further
Froomeeth/SeriliaOld
The serilia mod but on steroids (java) Authors: Froomeeth (Me(very based guy)) and nullevoy(Insert a german slur here)
JavaGPL-3.0