Topic on Controller talk:DualShock 3
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There's this thing but, it honestly sucks, I'm worried about being banned or something, I suppose I'll remove it manually if I need to play anything else on Steam. https://web.archive.org/web/20160307093352/http://forums.steampowered.com:80/forums/showthread.php?t=2936083&page=2#post35696019
Works fine on Windows 10.