Amnesia first week vs. any penumbra first week

[Unreal]

I believe Penumbra had a relatively quiet release. It has sold slowly but steadily over time due to word of mouth. People that played it were surprised by how great a horror game it was and would tell their friends. Word of Frictional's skill with horror slowly spread, creating the enthusiastic community which we're all apart of. So, in the lead up to Amnesia, there were now fans to take initiative and spread the word much earlier. Large media websites like IGN learned of the game and spread the word even further. Steam is now also a major part of the distribution of Frictional's games. Thus, Amnesia has had a MUCH bigger launch than Penumbra ever did. It will continue to sell as people continue to spread it by word of mouth (or text lol). My guess is that Amnesia will sell easily 4 to 5 times what Penumbra has done.