Originally conceived by Starfisher and DrunkPSA, and scripted by Starfisher, this gametype was first made in November 2003. However, it no longer worked after the patch.
Now, after consulting with Starfisher, I have remade it.
MP Risk 2.0
A gametype modifier that restricts combat build options to frigate and larger ships. Its intent is to encourage large, long duration strategic fleet battles.
Early-game lag due to the increased costs of capship research and production has been compensated for by increasing the default RU modifier and expanding the resourcer unit caps.
Additional starting fleet options have been added to make shorter games possible. You can start with the standard MS/carrier or altenately you can go with 2 MS's, MS & shipyard, or 2 carriers.
This release also contains a custom map made by Starfisher, designed especially for this mod. It is a symmetric, 4 player map named (appropriately enough) Symmetry.
The mod is packaged as a .grm1 (.big file). To play, just download it into your "..\homeworld2\bin\gamerules\" directory, and select "MP Risk 2.0" from the gametype dropdown box (where you normally see "Deathmatch") when starting a new game in skirmish or multiplayer.
Hope you find it enjoyable. As always, drop bug reports or comments in this thread.
You can get the file here.