NCSoft's April 22 announcement says the global version is being developed as a PC-only service distributed through Steam and PURPLE. The current Steam publisher page confirms the PC listing; do not apply Korea/Taiwan mobile availability to the global build.
Confirmed global platforms
NCSoft states that the global version is a PC-only service for Steam and PURPLE. Steam has an official publisher-controlled app page. These are the confirmed global distribution channels at the verification date.
Korea and Taiwan are different service contexts
The existing Korea and Taiwan services must not be used to infer global device support. Regional builds, accounts, stores and policies can differ. Check the page and client for the region you will actually use.
Language and regional servers
NCSoft announced regional server operation for North America, South America, Europe and Japan, with ten planned languages. Steam currently displays ten supported languages. Availability details remain subject to the regional service terms.
Steam or PURPLE
Choose the store connected to your preferred account and regional availability. Do not download repackaged clients from unofficial mirrors. Account linking and purchase terms should be read on the selected official platform.
Console and mobile questions
The cited global announcement describes PC-only service. This page does not claim a global console or mobile release because the verified global sources do not announce one.