The Maelstrom Mod introduces four new races to the Sins of a Solar Empire Rebellion Universe. They are independent of the original races and have unique strengths and weaknesses. Maelstrom is available for Rebellion, Diplomacy, Entrenchment and Original Sins.

UKWolfy says

10/10 - Agree Disagree

Amazing mod! Only a few things that I don't like! Well, actually just 1, the TEC Dreadnought is WAY more powerful than any of the others, my Replicator Dread was ripped to pieces by his TEC Dread