Extensions?

Is there a known list of extensions and where to get them for the TGF2? Or are they only allowed in MMF2?

They're only for MMF2.

You can get an upgrade discount for roughly the price difference between TGF2 and MMF2 if you ever want to upgrade!

here it shows what objects can be used, etc:

http://www.clickteam.com/website/usa/product-comparisons.html