Hmm.. my recollection was that Berzerk came first, but I guess my memory could be wrong. I just seem to remember Atari being on a roll, finally producing ports that looked like the arcade, and then blam! the Pacman disaster.
The AtariSoft effort (which published Atari's hits to Colecovision/INTV/C64/Apple/PC, etc) wasn't a thing until a year or two later. In 1982 the thinking seemed to be "get the biggest arcade hits, and make them exclusive to your system". Then 83/84 seemed that cross-publishing was important-- probably because the industry was collapsing all around them and they just wanted to get those sales wherever they could.