diff --git a/builtin/mainmenu/dlg_config_world.lua b/builtin/mainmenu/dlg_config_world.lua
index f73256612..e76e10ef7 100644
--- a/builtin/mainmenu/dlg_config_world.lua
+++ b/builtin/mainmenu/dlg_config_world.lua
@@ -61,12 +61,68 @@ local function init_data(data)
 	data.list:set_sortmode("alphabetic")
 end
 
+
+-- Returns errors errors and a list of all enabled mods (inc. game and world mods)
+--
+-- `with_errors` is a table from mod virtual path to `{ type = "error" | "warning" }`.
+-- `enabled_mods_by_name` is a table from mod virtual path to `true`.
+--
+-- @param world_path Path to the world
+-- @param all_mods List of mods, with `enabled` property.
+-- @returns with_errors, enabled_mods_by_name
+local function check_mod_configuration(world_path, all_mods)
+	-- Build up lookup tables for enabled mods and all mods by vpath
+	local enabled_mod_paths = {}
+	local all_mods_by_vpath = {}
+	for _, mod in ipairs(all_mods)  do
+		if mod.type == "mod" then
+			all_mods_by_vpath[mod.virtual_path] = mod
+		end
+		if mod.enabled then
+			enabled_mod_paths[mod.virtual_path] = mod.path
+		end
+	end
+
+	-- Use the engine's mod configuration code to resolve dependencies and return any errors
+	local config_status = core.check_mod_configuration(world_path, enabled_mod_paths)
+
+	-- Build the list of enabled mod virtual paths
+	local enabled_mods_by_name = {}
+	for _, mod in ipairs(config_status.satisfied_mods) do
+		assert(mod.virtual_path ~= "")
+		enabled_mods_by_name[mod.name] = all_mods_by_vpath[mod.virtual_path] or mod
+	end
+	for _, mod in ipairs(config_status.unsatisfied_mods) do
+		assert(mod.virtual_path ~= "")
+		enabled_mods_by_name[mod.name] = all_mods_by_vpath[mod.virtual_path] or mod
+	end
+
+	-- Build the table of errors
+	local with_error = {}
+	for _, mod in ipairs(config_status.unsatisfied_mods) do
+		local error = { type = "warning" }
+		with_error[mod.virtual_path] = error
+
+		for _, depname in ipairs(mod.unsatisfied_depends) do
+			if not enabled_mods_by_name[depname] then
+				error.type = "error"
+				break
+			end
+		end
+	end
+
+	return with_error, enabled_mods_by_name
+end
+
 local function get_formspec(data)
 	if not data.list then
 		init_data(data)
 	end
 
-	local mod = data.list:get_list()[data.selected_mod] or {name = ""}
+	local all_mods = data.list:get_list()
+	local with_error, enabled_mods_by_name = check_mod_configuration(data.worldspec.path, all_mods)
+
+	local mod = all_mods[data.selected_mod] or {name = ""}
 
 	local retval =
 		"size[11.5,7.5,true]" ..
@@ -87,6 +143,29 @@ local function get_formspec(data)
 			"textarea[0.25,0.7;5.75,7.2;;" .. info .. ";]"
 	else
 		local hard_deps, soft_deps = pkgmgr.get_dependencies(mod.path)
+
+		-- Add error messages to dep lists
+		if mod.enabled or mod.is_game_content then
+			for i, dep_name in ipairs(hard_deps) do
+				local dep = enabled_mods_by_name[dep_name]
+				if not dep then
+					hard_deps[i] = mt_color_red .. dep_name .. " " .. fgettext("(Unsatisfied)")
+				elseif with_error[dep.virtual_path] then
+					hard_deps[i] = mt_color_orange .. dep_name .. " " .. fgettext("(Enabled, has error)")
+				else
+					hard_deps[i] = mt_color_green .. dep_name
+				end
+			end
+			for i, dep_name in ipairs(soft_deps) do
+				local dep = enabled_mods_by_name[dep_name]
+				if dep and with_error[dep.virtual_path] then
+					soft_deps[i] = mt_color_orange .. dep_name .. " " .. fgettext("(Enabled, has error)")
+				elseif dep then
+					soft_deps[i] = mt_color_green .. dep_name
+				end
+			end
+		end
+
 		local hard_deps_str = table.concat(hard_deps, ",")
 		local soft_deps_str = table.concat(soft_deps, ",")
 
@@ -138,7 +217,6 @@ local function get_formspec(data)
 
 	if mod.name ~= "" and not mod.is_game_content then
 		if mod.is_modpack then
-
 			if pkgmgr.is_modpack_entirely_enabled(data, mod.name) then
 				retval = retval ..
 					"button[5.5,0.125;3,0.5;btn_mp_disable;" ..
@@ -167,9 +245,12 @@ local function get_formspec(data)
 	local use_technical_names = core.settings:get_bool("show_technical_names")
 
 	return retval ..
-		"tablecolumns[color;tree;text]" ..
+		"tablecolumns[color;tree;image,align=inline,width=1.5,0=" .. core.formspec_escape(defaulttexturedir .. "blank.png") ..
+			",1=" .. core.formspec_escape(defaulttexturedir .. "checkbox_16_white.png") ..
+			",2=" .. core.formspec_escape(defaulttexturedir .. "error_icon_orange.png") ..
+			",3=" .. core.formspec_escape(defaulttexturedir .. "error_icon_red.png") .. ";text]" ..
 		"table[5.5,0.75;5.75,6;world_config_modlist;" ..
-		pkgmgr.render_packagelist(data.list, use_technical_names) .. ";" .. data.selected_mod .."]"
+		pkgmgr.render_packagelist(data.list, use_technical_names, with_error) .. ";" .. data.selected_mod .."]"
 end
 
 local function handle_buttons(this, fields)
diff --git a/builtin/mainmenu/init.lua b/builtin/mainmenu/init.lua
index d073f5a57..f890765fa 100644
--- a/builtin/mainmenu/init.lua
+++ b/builtin/mainmenu/init.lua
@@ -21,6 +21,7 @@ mt_color_lightblue  = "#99CCFF"
 mt_color_green = "#72FF63"
 mt_color_dark_green = "#25C191"
 mt_color_orange  = "#FF8800"
+mt_color_red = "#FF3300"
 
 local menupath = core.get_mainmenu_path()
 local basepath = core.get_builtin_path()
diff --git a/builtin/mainmenu/pkgmgr.lua b/builtin/mainmenu/pkgmgr.lua
index b2f3243c4..32a65fd08 100644
--- a/builtin/mainmenu/pkgmgr.lua
+++ b/builtin/mainmenu/pkgmgr.lua
@@ -337,7 +337,7 @@ function pkgmgr.identify_modname(modpath,filename)
 	return nil
 end
 --------------------------------------------------------------------------------
-function pkgmgr.render_packagelist(render_list, use_technical_names)
+function pkgmgr.render_packagelist(render_list, use_technical_names, with_error)
 	if not render_list then
 		if not pkgmgr.global_mods then
 			pkgmgr.refresh_globals()
@@ -349,24 +349,59 @@ function pkgmgr.render_packagelist(render_list, use_technical_names)
 	local retval = {}
 	for i, v in ipairs(list) do
 		local color = ""
+		local icon = 0
+		local error = with_error and with_error[v.virtual_path]
+		local function update_error(val)
+			if val and (not error or (error.type == "warning" and val.type == "error")) then
+				error = val
+			end
+		end
+
 		if v.is_modpack then
 			local rawlist = render_list:get_raw_list()
 			color = mt_color_dark_green
 
-			for j = 1, #rawlist, 1 do
-				if rawlist[j].modpack == list[i].name and
-						not rawlist[j].enabled then
-					-- Modpack not entirely enabled so showing as grey
-					color = mt_color_grey
-					break
+			for j = 1, #rawlist do
+				if rawlist[j].modpack == list[i].name then
+					if with_error then
+						update_error(with_error[rawlist[j].virtual_path])
+					end
+
+					if rawlist[j].enabled then
+						icon = 1
+					else
+						-- Modpack not entirely enabled so showing as grey
+						color = mt_color_grey
+					end
 				end
 			end
 		elseif v.is_game_content or v.type == "game" then
+			icon = 1
 			color = mt_color_blue
+
+			local rawlist = render_list:get_raw_list()
+			if v.type == "game" and with_error then
+				for j = 1, #rawlist do
+					if rawlist[j].is_game_content then
+						update_error(with_error[rawlist[j].virtual_path])
+					end
+				end
+			end
 		elseif v.enabled or v.type == "txp" then
+			icon = 1
 			color = mt_color_green
 		end
 
+		if error then
+			if error.type == "warning" then
+				color = mt_color_orange
+				icon = 2
+			else
+				color = mt_color_red
+				icon = 3
+			end
+		end
+
 		retval[#retval + 1] = color
 		if v.modpack ~= nil or v.loc == "game" then
 			retval[#retval + 1] = "1"
@@ -374,6 +409,10 @@ function pkgmgr.render_packagelist(render_list, use_technical_names)
 			retval[#retval + 1] = "0"
 		end
 
+		if with_error then
+			retval[#retval + 1] = icon
+		end
+
 		if use_technical_names then
 			retval[#retval + 1] = core.formspec_escape(v.list_name or v.name)
 		else
@@ -503,7 +542,7 @@ function pkgmgr.enable_mod(this, toset)
 			if not mod_to_enable then
 				core.log("warning", "Mod dependency \"" .. name ..
 					"\" not found!")
-			else
+			elseif not mod_to_enable.is_game_content then
 				if not mod_to_enable.enabled then
 					mod_to_enable.enabled = true
 					toggled_mods[#toggled_mods+1] = mod_to_enable.name
diff --git a/doc/menu_lua_api.txt b/doc/menu_lua_api.txt
index 63e229135..4d495f21e 100644
--- a/doc/menu_lua_api.txt
+++ b/doc/menu_lua_api.txt
@@ -276,7 +276,18 @@ Package - content which is downloadable from the content db, may or may not be i
             depends          = {"mod", "names"}, -- mods only
             optional_depends = {"mod", "names"}, -- mods only
         }
+* core.check_mod_configuration(world_path, mod_paths)
+    * Checks whether configuration is valid.
+    * `world_path`: path to the world
+    * `mod_paths`: list of enabled mod paths
+    * returns:
 
+        {
+            is_consistent = true,  -- true is consistent, false otherwise
+            unsatisfied_mods = {},  -- list of mod specs
+            satisfied_mods = {}, -- list of mod specs
+            error_message = "",  -- message or nil
+        }
 
 Logging
 -------
diff --git a/src/script/common/c_content.cpp b/src/script/common/c_content.cpp
index 10670a60a..166980025 100644
--- a/src/script/common/c_content.cpp
+++ b/src/script/common/c_content.cpp
@@ -2143,3 +2143,35 @@ void push_collision_move_result(lua_State *L, const collisionMoveResult &res)
 	lua_setfield(L, -2, "collisions");
 	/**/
 }
+
+
+void push_mod_spec(lua_State *L, const ModSpec &spec, bool include_unsatisfied)
+{
+	lua_newtable(L);
+
+	lua_pushstring(L, spec.name.c_str());
+	lua_setfield(L, -2, "name");
+
+	lua_pushstring(L, spec.author.c_str());
+	lua_setfield(L, -2, "author");
+
+	lua_pushinteger(L, spec.release);
+	lua_setfield(L, -2, "release");
+
+	lua_pushstring(L, spec.desc.c_str());
+	lua_setfield(L, -2, "description");
+
+	lua_pushstring(L, spec.path.c_str());
+	lua_setfield(L, -2, "path");
+
+	lua_pushstring(L, spec.virtual_path.c_str());
+	lua_setfield(L, -2, "virtual_path");
+
+	lua_newtable(L);
+	int i = 1;
+	for (const auto &dep : spec.unsatisfied_depends) {
+		lua_pushstring(L, dep.c_str());
+		lua_rawseti(L, -2, i++);
+	}
+	lua_setfield(L, -2, "unsatisfied_depends");
+}
diff --git a/src/script/common/c_content.h b/src/script/common/c_content.h
index 06f80328a..ade3e4c1e 100644
--- a/src/script/common/c_content.h
+++ b/src/script/common/c_content.h
@@ -42,6 +42,7 @@ extern "C" {
 // We do a explicit path include because by default c_content.h include src/client/hud.h
 // prior to the src/hud.h, which is not good on server only build
 #include "../../hud.h"
+#include "content/mods.h"
 
 namespace Json { class Value; }
 
@@ -204,3 +205,5 @@ void push_hud_element          (lua_State *L, HudElement *elem);
 bool read_hud_change           (lua_State *L, HudElementStat &stat, HudElement *elem, void **value);
 
 void push_collision_move_result(lua_State *L, const collisionMoveResult &res);
+
+void push_mod_spec(lua_State *L, const ModSpec &spec, bool include_unsatisfied);
diff --git a/src/script/lua_api/l_mainmenu.cpp b/src/script/lua_api/l_mainmenu.cpp
index 4a847ed6d..cf4a057e1 100644
--- a/src/script/lua_api/l_mainmenu.cpp
+++ b/src/script/lua_api/l_mainmenu.cpp
@@ -38,7 +38,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "client/client.h"
 #include "client/renderingengine.h"
 #include "network/networkprotocol.h"
-
+#include "content/mod_configuration.h"
 
 /******************************************************************************/
 std::string ModApiMainMenu::getTextData(lua_State *L, std::string name)
@@ -409,6 +409,100 @@ int ModApiMainMenu::l_get_content_info(lua_State *L)
 	return 1;
 }
 
+/******************************************************************************/
+int ModApiMainMenu::l_check_mod_configuration(lua_State *L)
+{
+	std::string worldpath = luaL_checkstring(L, 1);
+
+	ModConfiguration modmgr;
+
+	// Add all game mods
+	SubgameSpec gamespec = findWorldSubgame(worldpath);
+	modmgr.addGameMods(gamespec);
+	modmgr.addModsInPath(worldpath + DIR_DELIM + "worldmods", "worldmods");
+
+	// Add user-configured mods
+	std::vector<ModSpec> modSpecs;
+
+	luaL_checktype(L, 2, LUA_TTABLE);
+
+	lua_pushnil(L);
+	while (lua_next(L, 2)) {
+		// Ignore non-string keys
+		if (lua_type(L, -2) != LUA_TSTRING) {
+			throw LuaError(
+					"Unexpected non-string key in table passed to "
+					"core.check_mod_configuration");
+		}
+
+		std::string modpath = luaL_checkstring(L, -1);
+		lua_pop(L, 1);
+		std::string virtual_path = lua_tostring(L, -1);
+
+		modSpecs.emplace_back();
+		ModSpec &spec = modSpecs.back();
+		spec.name = fs::GetFilenameFromPath(modpath.c_str());
+		spec.path = modpath;
+		spec.virtual_path = virtual_path;
+		if (!parseModContents(spec)) {
+			throw LuaError("Not a mod!");
+		}
+	}
+
+	modmgr.addMods(modSpecs);
+	try {
+		modmgr.checkConflictsAndDeps();
+	} catch (const ModError &err) {
+		errorstream << err.what() << std::endl;
+
+		lua_newtable(L);
+
+		lua_pushboolean(L, false);
+		lua_setfield(L, -2, "is_consistent");
+
+		lua_newtable(L);
+		lua_setfield(L, -2, "unsatisfied_mods");
+
+		lua_newtable(L);
+		lua_setfield(L, -2, "satisfied_mods");
+
+		lua_pushstring(L, err.what());
+		lua_setfield(L, -2, "error_message");
+		return 1;
+	}
+
+
+	lua_newtable(L);
+
+	lua_pushboolean(L, modmgr.isConsistent());
+	lua_setfield(L, -2, "is_consistent");
+
+	lua_newtable(L);
+	int top = lua_gettop(L);
+	unsigned int index = 1;
+	for (const auto &spec : modmgr.getUnsatisfiedMods()) {
+		lua_pushnumber(L, index);
+		push_mod_spec(L, spec, true);
+		lua_settable(L, top);
+		index++;
+	}
+
+	lua_setfield(L, -2, "unsatisfied_mods");
+
+	lua_newtable(L);
+	top = lua_gettop(L);
+	index = 1;
+	for (const auto &spec : modmgr.getMods()) {
+		lua_pushnumber(L, index);
+		push_mod_spec(L, spec, false);
+		lua_settable(L, top);
+		index++;
+	}
+	lua_setfield(L, -2, "satisfied_mods");
+
+	return 1;
+}
+
 /******************************************************************************/
 int ModApiMainMenu::l_show_keys_menu(lua_State *L)
 {
@@ -921,6 +1015,7 @@ void ModApiMainMenu::Initialize(lua_State *L, int top)
 	API_FCT(get_worlds);
 	API_FCT(get_games);
 	API_FCT(get_content_info);
+	API_FCT(check_mod_configuration);
 	API_FCT(start);
 	API_FCT(close);
 	API_FCT(show_keys_menu);
diff --git a/src/script/lua_api/l_mainmenu.h b/src/script/lua_api/l_mainmenu.h
index 6ceff6dd7..9dc40c7f4 100644
--- a/src/script/lua_api/l_mainmenu.h
+++ b/src/script/lua_api/l_mainmenu.h
@@ -82,6 +82,8 @@ private:
 
 	static int l_get_content_info(lua_State *L);
 
+	static int l_check_mod_configuration(lua_State *L);
+
 	//gui
 
 	static int l_show_keys_menu(lua_State *L);
diff --git a/textures/base/pack/checkbox_16_white.png b/textures/base/pack/checkbox_16_white.png
new file mode 100644
index 000000000..0cf0f3e65
Binary files /dev/null and b/textures/base/pack/checkbox_16_white.png differ
diff --git a/textures/base/pack/error_icon_orange.png b/textures/base/pack/error_icon_orange.png
new file mode 100644
index 000000000..1f1586f21
Binary files /dev/null and b/textures/base/pack/error_icon_orange.png differ
diff --git a/textures/base/pack/error_icon_red.png b/textures/base/pack/error_icon_red.png
new file mode 100644
index 000000000..1f5bafbf4
Binary files /dev/null and b/textures/base/pack/error_icon_red.png differ