One of my favourite 68k demo supporting RTG is Multiverse by Loonies: http://ada.untergrund.net/?p=demo&i=479
Most of the latest demos from RNO, Dekadence, Unique and Zenon do work on RTG too. And I think Ephidrena's demos too. And all "demos" made with Karate.
There are quite many demos during the years if you start digging, but unfortunately I don't remember all right now
Wasn't there some page which did list RTG compatible games and demos?
Originally Posted by bonkers
Well, at least this requires 3D gfx card on 68k.. ReBirth by Push: http://ada.untergrund.net/?p=demo&i=396
It works at least with Permedia2 (B/CVision) and Voodoo3. I haven't tried with Virge... It also works on next gen systems with 68k/warp3d support like on MorphOS.