Generated by analyze.py from data/steam.db. 802 apps in the mirror; 40 pass every filter.
A game can have been a phenomenon without ever having a big concurrent population. Mount Your Friends peaked at 1,141 CCU but sold to thousands: its moment happened on YouTube, and people played it in short bursts at parties. Ranking on concurrent peaks cannot find that game, and it is the whole point of this list.
So this ranks on audience rather than concurrency: