Ghost Race

The Ghost is for players who survive a whole wipe while genuinely playing it — not someone who logged in once and vanished. The line is set in two steps:

1. Minimum-playtime floor. Drive-by visits are filtered out using Otsu's method— a standard technique for finding the natural split between two groups — applied to players' (log-scaled) playtimes. It finds the cut between casual visitors and real participants for this wipe, usually around an hour. Currently: players need at least 53m to be counted.

2. The line = the top 10%. Among everyone above that floor, the qualifying line is the 90th percentile— you need more playtime than 90% of the players who genuinely played this wipe. It's a deliberately high bar: a Ghost isn't just anyone who survived, it's someone who lived on the server. We use a percentile (not the average) so a few players with enormous playtime can't distort where the line sits.

To earn the Ghost you must finish the wipe deathless with playtime above this line. The line drifts as the wipe goes on and more people play, so it's shown live.