I just pushed a change to the Development branch that will leverage a lot of the new tools from 16.5, such as the new UVLayout and PolyReduce.
I have also changed all of the node names to have a gamedev namespace in the operator and the name of the nodes themselves now start with GameDev, in order to clearly identify them.
I'm currently working on updating the documentation page https://www.sidefx.com/tutorials/game-development-toolset-overview/ [www.sidefx.com] with the new nodes (there are quite a few)
A release will be created tomorrow, so you'll be able to grab the tools from the updater inside Houdini. But if you want to test early, then you can just manually grab from the Development Branch.
Hope you like the new toys