Do you have to have a Blu-ray rom to play some PC games

As of now there are no PC games that are sold on Blu-ray discs, in part because most computers made today don't even have Blu-ray drives. When PC games start being sold on Blu-ray discs, there will most likely be DVD versions being sold concurrently, as it was when DVD-ROM drives first started appearing. It will probably be a while before PC games are sold exclusively on Blu-ray. In fact, it may never even happen, digital download is becoming so popular it may supplant physical media in the future.