George Broussard heeft op het 3D Realms message board een posting geplaatst over de complexiteit van hedendaagse (single player) 3D Shoot'em ups en waarom het zo lang duurt om die games te ontwikkelen:
“Today’s games are MUCH more complex. In Duke 3D all the characters were sprites. Today they are polygonal models, have to be skinned, and then animated or motion captured. A VERY long, tedious and complex process. Also games today are "deeper" and require more than key/door stuff. That means more time to develop. Note all the so-so fps games that didn't sell well in the last 2 years and you will see that they were simple compared to more complex efforts like Half-Life. A game like DNF is probably 5-10 times more complex that Duke 3D was.”