A lot of things.

app/Models/Game.php

@@ -21,4 +21,9 @@ class Game extends Model
     {
         return $this->belongsTo(Genre::class);
     }
+
+    public function entries(): Game|\Illuminate\Database\Eloquent\Relations\HasMany
+    {
+        return $this->hasMany(Entry::class);
+    }
 }