Summary: Many of the poor critic ratings, I believe, were written back when Achron was still under primary development. I'd compare it to tasting a cake that's not done cooking yet - of course it's not going to appeal to many people.
Summary: This is, as I write this, most likely becoming my second favorites strategy game after Starcraft Broodwar. Let's put it straight first. For me real time strategy games is all about multiplayer. So I don't care if the campaign of this time travel extravaganza is supposebly weak.