You may remember the march of Liberty Prime, a set piece from Fallout 3 where the massive communist-hating robot stampedes across the wasteland and terrorizes everything in his path. Even climactic moments like the faceoff against big bad Mehrunes Dagon in Oblivion, which released two years before Fallout 3, seem static compared to Prime; Dagon is big and all, but Prime trundles across the open world like any other NPC.
You might think it's as simple as dropping a 3D model into the world and letting him run around, but the specifics of Prime's march took endless hours to get right. As Bethesda's studio and production director Angela Browder recalled in an interview with PC Gamer's Ted Litchfield, "Liberty Prime is just one of those ones where we spent months trying to get him to walk this very specific path. Months."
