Food shaped like words? Alphabet soup?

Anyway, I think it comes down to does the developer have a publisher that is able to distribute the game in the region. And then you have to factor in regional laws, rating systems ( such as the ESRB or whatever) and then holidays and good sale times. Also have to factor in regional tastes. I mean a game that has rabid killing of nazis may not be able to be marketed in Germany due to the Nazism or China may not let C&C Generals in the country because to them, it portrays China in a bad light. ( Still don't understand that one myself, in Generals, China was a terrorist-killing machine ) so overall, I think it's a lot of different factors.

I think that one was for several reasons. For one, the Chinese numbers bonus is refereed to as the "Horde Bonus." This means the game is calling the Chinese a "horde," which is a negative name to the Chinese because of their history with the Mongols. Also, I hear that the fact that China uses nuclear weapons in the game sorta pissed them off. The Chinese and their Socialist government is just picky about everything. Plus...Generals portrayed China as a really crude and underdeveloped military that still uses bolt-action rifles and other extremely outdated weapons.

Anyway, as for the original topic, I think the main factors are translation. Some publishers just aren't willing to fund the release of a game in another region if they are unsure of how it will sell, especially if it requires the game be translated into another language. Sometimes, they just can't even get a distributor. As Monco has pointed out, Europe isn't getting Sins of a Solar Empire because they can't find someone to distribute it over there. The developers were only able to distribute it in North America, though anyone from any region can purchase the game online through their download service I believe.

Or perhaps the devs just can't get the funding to release it overseas. As you will notice, several of the games on that list are obviously low-budget, such as that Russian game 2025: Battle for Fatherland. They probably couldn't get a publisher to fund a North American or European release outside of Russia because it was designed as a more obscure Russian release.

Cultural and regional tastes would also explain some of these. I think this is the main reason why so many NES, SNES, and early PlayStation games never made it over here. It wasn't really until the late 90s that Japanese companies started to really take chances with more American and European releases of games.