diff --git a/backend/app/api/v1/marathons.py b/backend/app/api/v1/marathons.py
index b82c1d6..c13b5ec 100644
--- a/backend/app/api/v1/marathons.py
+++ b/backend/app/api/v1/marathons.py
@@ -308,9 +308,12 @@ async def start_marathon(marathon_id: int, current_user: CurrentUser, db: DbSess
     if len(approved_games) == 0:
         raise HTTPException(status_code=400, detail="Добавьте и одобрите хотя бы одну игру")
 
-    # Check that all approved games have at least one challenge
+    # Check that all approved challenge-based games have at least one challenge
+    # Playthrough games don't need challenges
     games_without_challenges = []
     for game in approved_games:
+        if game.is_playthrough:
+            continue  # Игры типа "Прохождение" не требуют челленджей
         challenge_count = await db.scalar(
             select(func.count()).select_from(Challenge).where(Challenge.game_id == game.id)
         )