To be honest I don't understand why Geerbox needs the source code to remake Catalyst. It doesn't look like they used any Homeworld 1 source code or assets in the Homeworld 1 remake. It all looks like from scratch in their modified Homeworld 2 engine. Unless it's not the source code they need but the assets, for models. I read that they stated it is possible for them to hack the original executable to make it playable on modern systems.