Donation Discount

[SHODANFreeman]

I've got it... Unfortunately I've played for the first time the game yesterday. There aren't other discounts for who buyed the first chapter?

Or will be available in the future the Mac edition on Steam?

I'm fairly sure that the Mac version will be available at some point on Steam, but in the mean time, GamersGate.com and MacGameStore.com both charge the same price as Steam and Frictional for Penumbra Collection, so unfortunately you'd have to pay the full $20 at the moment to get the rest of the games on Mac. (And if you end up doing so, I'd recommend buying direct from Frictional)

Steam offers Black Plague Gold for $15 (and the retail version on Amazon is even cheaper), which is all that you're missing, since you already have Overture, but they are PC only at the moment.