As the "ultimate" version of the original game, it includes massive quality-of-life updates and new content:
Revamped craft and save loading menus, plus new discoverable launch sites and easter eggs across the solar system. v1.12.4 Specific Changes FГЎjl: Kerbal.Space.Program.v1.12.4.03187.Incl.A...
Introduced new parts like fireworks dispensers , revolving docking ports, and a brand-new "Slim" suit. As the "ultimate" version of the original game,