I read on reddit (so it might be completely false) that originally it was supposed to be China as the invaders rather than the DPRK. But the game was made after US-China diplomatic relations were normalised so they had to change the antagonist country.
The antagonists in Homefront were originally intended to be communist Chinese, but were later replaced by a unified Korea for two reasons: the risk of a possible backlash by the Chinese Ministry of Culture and the reality of economic interdependence between America and China that made the Chinese “not that scary,” according to Tae Kim, a former CIA field agent and consultant on the game’s backstory.
I read on reddit (so it might be completely false) that originally it was supposed to be China as the invaders rather than the DPRK. But the game was made after US-China diplomatic relations were normalised so they had to change the antagonist country.
That was the remake of the movie “Red Dawn”.
And the antagonist was changed because the Chinese government refused to allow the movie to premier in China.
This was also the case with this game.
This is the source: https://kotaku.com/china-is-both-too-scary-and-not-scary-enough-to-be-vide-5732623