The Masters Mod will add a little more challenge and variety to SE4. It'll open up different strategic options, depending on what areas your race has "mastered."
The mod adds 10 new racial traits:
[*]Drone Masters - start with drones, and they're actually useful[*]Megascale Masters - start with slight colony ship size advantage, and ships are huge but expensive and slow near the end of the tech tree[*]Stealth Masters - start w/ minor cloaking device, & gets cloaked planets later on[*]War Masters - ships are tougher offensively, and fight better in groups[*]Travel Masters - ships go faster, and can store more supplies[*]Troop Masters - starts w/ troops, & later troops are much cheaper and easier to build (troop scheme similar to the Units Mod, and the Pointer Mod)[*]Assimilation Masters - think Borg[*]Fighter Masters - start w/ fighters, & more carrier options[*]Defense Masters - start w/ armor, gets better shield and armor comps, and eventually gets planetary shields[*]Resource Masters - booms faster, and can generate resources in space
Unlike the regular racial traits, the Master traits expand the existing tech tree, encourages you to focus on different strategies, and makes the AI tougher.
Read the full description here
All the techs are done, and I'm working on the AI now. I just finished the AI for the Drone Masters.