Grand Theft Auto V has set a new Steam record for peak concurrent users by a game not developed by Valve, reports GamesIndustry.biz. They say the game's peak yesterday of 300,452 concurrent Steam users broke a record held by The Elder Scrolls V: Skyrim, which had about 280K peak users upon release. This means today's total of 301,246 is also a new record, though it's hard to say what this represents, since not all users are playing the game through Steam. Thanks Polygon via nin.