You get the multi-player with the update you download. It's hectic and fast paced. The modes are typical what you'd expect from a fps I've also heard of some bugs but can't say so personally. I like it.
I bought the game like 2 days ago, i never played doom before so i wanted to give it a try, i have only play the campaing mode but ima star playing online since all u guys said its good
Thank you everybody