diff --git a/gamedata/core.games/common.games.txt b/gamedata/core.games/common.games.txt
index e44ea9996..407fe10ee 100644
--- a/gamedata/core.games/common.games.txt
+++ b/gamedata/core.games/common.games.txt
@@ -372,6 +372,7 @@
 			"engine"	"blade"
 			"engine"	"insurgency"
 			"engine"	"mcv"
+			"engine"	"doi"
 		}
 		
 		"Keys"