For the first eight months, Nathan was actually programming tools to bring what we see in the final product to life. After he programmed all the necessary components, then he went back and actually used them to help create what ended up in our hands. That's pretty impressive. Working on an existing IP, he said, is a blessing and a curse. Especially for God of War since there are so many expectations surrounding it. The stylistic guidelines they used to keep the game familiar to fans is pretty clever.
The challenges faced by the staff for making the PSP game were numerous -- insert all sort of technical mumbo-jumbo here. Cramming the game onto the PSP is one thing, but only having 15 artists to do it really puts the workload into perspective. If you want to hear more about his experience programming for the game, or his proudest accomplishment, read the full interview. It's really quite entertaining.