Star.control.origins.earth.rising.part.4-codex....

Keep an eye out for the Antimatter Beam and Inertial Dampener upgrades.

By this point, you should have plenty of RU (Resource Units). Don't hoard them—spend everything on the best possible planetary landers and ship modules. Star.Control.Origins.Earth.Rising.Part.4-CODEX....

Information is key. Revisit your allies (like the Mowlings or the Mu'Kay) to see if they have new dialogue or tech to offer before the final push. Keep an eye out for the Antimatter Beam

If your Part 3 saves aren't loading, ensure the Part 4 DLC is properly installed in the DLC folder within your game directory. Star.Control.Origins.Earth.Rising.Part.4-CODEX....