First 3D gen, hands down. The HD implementation was just a visual improvment. Even the expression High Definition is subjective. High to whom? Every visual improvment over the other can be considered a higher definition if you think about it
The first 3D gen was, at the same time, a horizon of new possibilities regarding game development and a restrain due to the limitation of this new technology, which forced the develops to think outside of the box and come up with creative ideas for gameplay, game's aeasthetics and enven programming, to deal with those restrains. Besides, the poligonal visual from that time was impressive back then, and charming and nostalgic nowadays







