diff -r d2e477eee433 -r 9d4a6ab60dec share/hedgewars/Data/Missions/Campaign/A_Classic_Fairytale/backstab.lua
--- a/share/hedgewars/Data/Missions/Campaign/A_Classic_Fairytale/backstab.lua	Mon Jun 17 00:10:18 2019 +0200
+++ b/share/hedgewars/Data/Missions/Campaign/A_Classic_Fairytale/backstab.lua	Mon Jun 17 19:20:02 2019 +0200
@@ -1260,3 +1260,11 @@
     highJumped = true
   end
 end
+
+function onGameResult(winner)
+  if winner == GetTeamClan(nativesTeamName) then
+    SendStat(siGameResult, loc("Mission succeeded!"))
+  else
+    SendStat(siGameResult, loc("Mission failed!"))
+  end
+end