In these dreams, a strange person asks Ryan to destroy the seven evils, which are incarnated in seven people. And that's where your anti-hero's violent adventure begins - a graphic adventure for adults where dying is not only possible, but actually very common.
Gameplay allows you to perform the same sorts of actions you would in a similar game: you can pick up objects, use them, talk to other characters, etc. The main change is that the game is played from an overhead perspective as opposed to the classic third-person view.
Dreamweb is an interesting graphic adventure that still plays well despite its age. It's true that it can get a little difficult, but overall it's worth the effort.