Well Orange Brat , that's the difference from some good games here and here and
some bigger , more commercial games made with a real team :
some strong programmers, 3D artists.
But 3D ready to go packages are very helpfull , even big big companyes prefer to buy Unreal Engine 3 that is a proven , next gen one than loosing years on
making a 3D engine.
Fortunatly in indie market and big commercial one, some will always make their own engine :
Crytek for example !
Well ... yes we have 3DGS and some others, for fun and pleasure of game making