The world's first real-time multiplayer defense game. Castle Defense Online! 1. 4 users can play cooperatively in real time. 2. Easy control with 2D horizontal scroll. 3. Collect unique characters, powerful skills, and various items. 4. Become stronger with 50 runes and 30 relics. 5. There are cute enemies and scary jungle monsters. 6. Clear the impossible bosses. 7. Build towers that can use a variety of strategies. 8. Meet and grow with friends in the guild. Can you safely stop incoming enemies?