Does dlc in Titan Mission need ontology?

No need. Titan mission is a fantasy action RPG built in ancient Greece and Rome, developed by IronLoreEntertainment and released by THQ on June 26th, 2006. THQNordic Studio has released a DLC《Ragnarok of Titan quest, which costs 79 yuan RMB, so it is not cost-effective. Because this version is relatively backward, there is no need to buy the ontology. There are a lot of interesting game characters in Titan Mission, and the game has been sought after by many gamers since its release.