[Source] I am not really sure when, but publisher En Masse Entertainment updated its list of countries able to play in TERA North America, with Asian countries such as Singapore, Malaysia and the Philippines now on the list. There are no plans for a SEA server, but this is certainly as good as it gets.
In other news, the same Asian countries will be able to play Zombies Monsters Robots, En Masse’s later online shooter. The full list of countries with access can be viewed here. Currently launched in the Philippines as Mercenary Online, I am actually surprised the IP block was lifted.