To commemorate the launch of The Penumbra Collection for Mac and Linux, Frictional Games has decided to put the entire package on sale for a mere $5 (regular price $20) this weekend only. The offer will last for three days, starting from the 17th of July (Friday) and ends on Sunday, the 19th of July. You can purchase it at the sale price direct from Frictional Games or any of the other three participating stores.

The Penumbra Collection contains the original Penumbra: Overture, Penumbra: Black Plague and the expansion, Penumbra Requiem. Download links for demos are available from the official site for the Penumbra series.

[UPDATE: The Penumbra Collection for Windows will be on sale this weekend for only $5 on GamersGate as well. Thanks, Joshua!]

Re-release of the Penumbra Series for Mac and Linux (USD 5 launch offer)