Quake 1 ? Quake 2 ?

"GB" gibt die Anwort mit welcher Engine 3DR damals für Duke Forever angefangen hat :

We really didn't use Quake 1. When we were finishing Shadow Warrior a couple of guys were playing with Quake 1, while we were waiting for Quake 2 code (late 97/early 98). We didn't really start even hiring people for DNF until late 97, after we shipped Shadow Warrior, and into early 98. We then prototyped some stuff in Quake 2 from Jan 98 until about E3 or so. Then we moved to Unreal 1. The rest is history, long and painful as it's been at times