For Early Access games -- and alphas in general -- the trend is to offer the game at a lower price to entice people to pay for the privilege of playing / testing a busted version of your work. Stardock's Galactic Civilizations III is one of a number of recent titles that's drifted away from this model -- instead, you'll need to fork over more than what the final version will likely go for, in Stardock's case, this the rather heavy amount of $US100.