diff --git a/stats/known_apks.txt b/stats/known_apks.txt
index c575f7beca..3fa28ebc74 100644
--- a/stats/known_apks.txt
+++ b/stats/known_apks.txt
@@ -3438,6 +3438,7 @@ org.esteban.piano_6.apk org.esteban.piano 2014-07-11
 org.ethack.orwall_16.apk org.ethack.orwall 2014-08-05
 org.ethack.orwall_18.apk org.ethack.orwall 2014-08-06
 org.ethack.orwall_19.apk org.ethack.orwall 2014-08-11
+org.ethack.orwall_20.apk org.ethack.orwall 2014-08-22
 org.evilsoft.pathfinder.reference_19.apk org.evilsoft.pathfinder.reference 2014-01-07
 org.evilsoft.pathfinder.reference_27.apk org.evilsoft.pathfinder.reference 2014-05-11
 org.evilsoft.pathfinder.reference_29.apk org.evilsoft.pathfinder.reference 2014-08-15