I think you misunderstood. I mean that as far as Windows goes, it will only run on 2k/XP. It will not run on 98/ME. A Linux version will be available once the game ships and the Mac port a few weeks later.
Hopefully this just means that 98/ME won't be officially supported, but the game may still run.
Hopefully this just means that 98/ME won't be officially supported, but the game may still run.