The co-creator of Twisted Metal, David Jaffe, wanted to make a game about the Chinese military invading the United States once upon a time. Heartland for the PSP would have been "a very liberal response to the Bush administration and the Iraq War," Jaffe has said, a first-person shooter that evoked intense emotion.
While Heartland never saw the light of day, something close to it was recently released, THQ and Kaos Studios' Homefront. Both told Red Dawn-inspired tales of a U.S. invasion, with Heartland featuring China as the aggressor, Homefront using a unified Korea. (Homefront was originally envisioned with a Chinese threat.)