Map impact

How each map tends to affect server population, not just how often it's played. Avg Δ is the average change in concurrent players from when a map started to when it ended, across every time it's been played — negative means the map tends to lose players, positive means it tends to gain them. Retention is the average end-vs-start population as a percentage. Best/worst Δ are the single best and single worst swings recorded for that map.