Penumbra: Black PlagueFrictional GamesReleased 23 Jan 2009·App 22120Steam user reviewsVery Positive93.7%· 3K reviewsRecent Mostly Positive · 73%SteamPeaks Rating92.7 Very positiveRecent 30 days 43.4How it works ›Playing now3+2 vs. yesterday2.5%of peakAll-time peak121Feb 2013