Dust off your Quake skills before Quake Champions hits next year :)
It used to be free but sadly no more. Cheapest it's been in a while.http://steamcharts.com/app/282440
705 players in the last hour, 898 player 24hr peak. Which is actually really high for an old school arena shooter these days.
RECENT: Very Positive (355 reviews)
OVERALL: Very Positive (10,701 reviews)
Release Date: 6 Aug, 2010