Here you go
1] What is the name of the engine used in the "Duke Nukem 3D" game?
Build engine
2] "The Machines" is a sports/mecha game produced by which game developer?
There where a few answerers I ended up judging correct. Zeppelin Games, Junkyard and Merit studios
Acclaim was a answer I often got but they did not make a game that was either a SPORTS/mecha game nor had the name THE Machines.
3] What is the difference between a sprite and a model in a FPS game?
Any answer containing the 2D 3D dichotomy
4] Who was the lead designer for "Total Annihilation: Kingdoms"
Clayton Kauzlaric
5] Who played the voice of Jon Irenicus in Bioware's "Baldur's Gate II: Shadows of Amn"
David Warner