I have some games that, after being installed, just work without the DVD. I would say if it works without the DVD, well, um, it works without the DVD. It sounds like you answered your own question.

Back in the days of Commodore 64 I used to dream about games like Divinity 2.

Yesterday is history, Tomorrow is a mystery
Today is a gift, That's why it's called the present.
(Taken from Kung Fu Panda)