Index: binaries/data/mods/mod/gui/modmod/modmod.js
===================================================================
--- binaries/data/mods/mod/gui/modmod/modmod.js
+++ binaries/data/mods/mod/gui/modmod/modmod.js
@@ -31,7 +31,7 @@
 /**
  * Version checks in mod dependencies can use these operators.
  */
-var g_CompareVersion = /(<=|>=|<|>|=)/;
+const g_CompareVersion = /(<=|>=|<|>|=)/;
 
 /**
  * Folder names of all mods that are or can be launched.
@@ -57,7 +57,7 @@
 		if (g_RequiredProperties.every(prop => mods[folder][prop] !== undefined))
 			g_Mods[folder] = mods[folder];
 		else
-			warn("Skipping mod '" + mod + "' which does not define '" + property + "'.");
+			warn("Skipping mod '" + folder + "' which does not define all required properties.");
 
 	deepfreeze(g_Mods);
 
@@ -166,10 +166,7 @@
 
 	for (let i = 0; i < g_ModsEnabled.length; ++i)
 		if (!areDependenciesMet(g_ModsEnabled[i]))
-		{
-			g_ModsDisabled.push(g_ModsEnabled.splice(i, 1)[0]);
-			--i;
-		}
+			g_ModsDisabled.push(g_ModsEnabled.splice(i--, 1)[0]);
 
 	modsEnabledList.selected = Math.min(pos, g_ModsEnabled.length - 1);
 
@@ -289,7 +286,7 @@
 }
 
 /**
- * @param dependency is a mod name or a mod version comparison.
+ * @param dependency is a mod name or a mod version comparison, such as "0ad<=0.0.23".
  */
 function isDependencyMet(dependency)
 {
@@ -298,7 +295,7 @@
 
 	return g_ModsEnabled.some(folder =>
 		g_Mods[folder].name == name &&
-		(!operator || versionSatisfied(g_Mods[folder].version, operator, version)));
+		(!operator || versionSatisfied(g_Mods[folder].version, operator[0], version)));
 }
 
 /**
@@ -319,7 +316,7 @@
 	{
 		let diff = +versionList1[i] - +versionList2[i];
 		if (isNaN(diff))
-			continue;
+			return false;
 
 		if (gt && diff > 0 || lt && diff < 0)
 			return true;
@@ -344,7 +341,7 @@
 {
 	let dependencies = {};
 	for (let folder of g_ModsEnabled)
-		dependencies[folder] = g_Mods[folder].dependencies.map(d => d.split()[0]);
+		dependencies[folder] = g_Mods[folder].dependencies.map(d => d.split(g_CompareVersion)[0]);
 
 	g_ModsEnabled.sort((folder1, folder2) =>
 		dependencies[folder1].indexOf(g_Mods[folder2].name) != -1 ? 1 :