diff --git a/app/flatpages/help/package_config.md b/app/flatpages/help/package_config.md
index 5ddc5c09..114a3841 100644
--- a/app/flatpages/help/package_config.md
+++ b/app/flatpages/help/package_config.md
@@ -37,6 +37,8 @@ ContentDB understands the following information:
 and for mods only:
 
 * `name` - the mod technical name.
+* `supported_games` - List of supported game technical names.
+* `unsupported_games` - List of not supported game technical names. Useful to override game support detection.
 
 
 ## .cdb.json
diff --git a/app/logic/game_support.py b/app/logic/game_support.py
index 23d11731..6348087b 100644
--- a/app/logic/game_support.py
+++ b/app/logic/game_support.py
@@ -17,7 +17,7 @@
 
 import sys
 
-from typing import List, Dict, Optional, Iterator, Iterable
+from typing import List, Dict, Optional, Iterator, Iterable, Tuple
 
 from app.logic.LogicError import LogicError
 from app.models import Package, MetaPackage, PackageType, PackageState, PackageGameSupport, db
@@ -167,25 +167,23 @@ class GameSupportResolver:
 				db.session.add(support)
 
 	"""
-	Add supported game to a package, given the confidence.
+	Update game supported package on a package, given the confidence.
 	
 	Higher confidences outweigh lower ones.
 	"""
-	def add_supported(self, package: Package, supported_games: PackageSet, confidence: int):
-		previous_supported: Dict[str, PackageGameSupport] = {}
+	def set_supported(self, package: Package, game_is_supported: List[Tuple[Package, bool]], confidence: int):
+		previous_supported: Dict[int, PackageGameSupport] = {}
 		for support in package.supported_games.all():
 			db.session.merge(support.game)
-			previous_supported[support.game.getId()] = support
+			previous_supported[support.game.id] = support
 
-		for game in supported_games:
-			assert game
-
-			lookup = previous_supported.pop(game.getId(), None)
+		for game, supports in game_is_supported:
+			lookup = previous_supported.pop(game.id, None)
 			if lookup is None:
 				support = PackageGameSupport(package, game, confidence)
 				db.session.add(support)
 			elif lookup.confidence <= confidence:
-				lookup.supports = True
+				lookup.supports = supports
 				lookup.confidence = confidence
 				db.session.merge(lookup)
 
@@ -195,4 +193,9 @@ class GameSupportResolver:
 
 	def update(self, package: Package) -> None:
 		retval = self.resolve(package, [])
-		self.add_supported(package, retval, 1)
+
+		game_is_supported = []
+		for game in retval:
+			game_is_supported.append((game, True))
+
+		self.set_supported(package, game_is_supported, 1)
diff --git a/app/models/packages.py b/app/models/packages.py
index 783485af..cf5da522 100644
--- a/app/models/packages.py
+++ b/app/models/packages.py
@@ -507,8 +507,8 @@ class Package(db.Model):
 		return self.getSortedDependencies(False)
 
 	def getSortedSupportedGames(self):
-		supported = self.supported_games.all()
-		supported.sort(key=lambda x: -x.game.score)
+		supported = self.supported_games.filter_by(supports=True).all()
+		supported.sort(key=lambda x: -(x.game.score + 100000*x.confidence))
 		return supported
 
 	def getAsDictionaryKey(self):
diff --git a/app/tasks/importtasks.py b/app/tasks/importtasks.py
index 2ef9a6c7..b125c207 100644
--- a/app/tasks/importtasks.py
+++ b/app/tasks/importtasks.py
@@ -20,6 +20,7 @@ from zipfile import ZipFile
 from git import GitCommandError
 from git_archive_all import GitArchiver
 from kombu import uuid
+from sqlalchemy import or_, and_
 
 from app.models import *
 from app.tasks import celery, TaskError
@@ -27,7 +28,7 @@ from app.utils import randomString, post_bot_message, addSystemNotification, add
 from app.utils.git import clone_repo, get_latest_tag, get_latest_commit, get_temp_dir
 from .minetestcheck import build_tree, MinetestCheckError, ContentType
 from ..logic.LogicError import LogicError
-from ..logic.game_support import GameSupportResolver
+from ..logic.game_support import GameSupportResolver, PackageSet
 from ..logic.packages import do_edit_package, ALIASES
 from ..utils.image import get_image_size
 
@@ -73,6 +74,20 @@ def getMeta(urlstr, author):
 		return result
 
 
+def get_games_from_csv(csv: str) -> List[Package]:
+	retval = []
+	supported_games_raw = csv.split(",")
+	for game_name in supported_games_raw:
+		game_name = game_name.strip()
+		if game_name.endswith("_game"):
+			game_name = game_name[:-5]
+		games = Package.query.filter(and_(Package.state==PackageState.APPROVED, Package.type==PackageType.GAME,
+				or_(Package.name==game_name, Package.name==game_name + "_game"))).all()
+		retval.extend(games)
+
+	return retval
+
+
 def postReleaseCheckUpdate(self, release: PackageRelease, path):
 	try:
 		tree = build_tree(path, expected_type=ContentType[release.package.type.name],
@@ -118,6 +133,15 @@ def postReleaseCheckUpdate(self, release: PackageRelease, path):
 		# Update game supports
 		if package.type == PackageType.MOD:
 			resolver = GameSupportResolver()
+			game_is_supported = []
+			if "supported_games" in tree.meta:
+				for game in get_games_from_csv(tree.meta["supported_games"]):
+					game_is_supported.append((game, True))
+			if "unsupported_games" in tree.meta:
+				for game in get_games_from_csv(tree.meta["unsupported_games"]):
+					game_is_supported.append((game, False))
+
+			resolver.set_supported(package, game_is_supported, 10)
 			resolver.update(package)
 
 		# Update min/max