Link
I wonder how accurate this information, even though it's taken from a print mag, it's still Polish
But 30 sounds like the right amount of levels for me, as Doom 2 had 30 levels (+2 hudden of course). Absence of multiplayer system at launch is however somewhat disappointing, and I hope it's not true. And that thing about ATI's tech not being implemented... My guess it's ATI's punishment for (supposedly) leaking that recent Doom 3 alpha.