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Valve faces a £656 million lawsuit in the UK for 'overcharging 14 million PC gamers'
(www.gamingonlinux.com)
Steam is a video game digital distribution service by Valve.
Steam News | Steam Beta Client news
Useful tools:
SteamDB
SteamCharts
Issue tracker for Linux version of Steam
Adding a link to my other comment: see points 204 and 205 in the filing for where it alleges Steam enforces pricing for non-key sales.