I'd say that Ghost Master is a pretty mediocre game with an interesting, and potentially very fun idea driving the whole thing. My biggest complaint about this game is the lack of control you feel. When I purchased this game, I was expecting to be laying down intricate traps to scare mortals, and be controlling an arsenal of ghosts. Instead you are limited to where you can place the spirits based on what there is in a room, or if it is inside or out, and so on. These restrictions aren't awful, however it's the ghosts abilities that really killed it for me. The ghosts abilities work on a power band, the higher abilities costing more points to use, the lower ones are cheaper. When you choose an ability for a ghost to use, they wait for a timer bar to fill up, then may or may not cast the ability. People are constantly moving from room to room, and rarely pause, so it makes trying to set up a scare extremely frustrating as it amounts to you clicking in a room and hoping that someone will pass through at the right time. I may be being a little unfair, as you can use spirits to lure people to certain rooms, and set requirements on abilities such as "only use when someone is present" but that just doesn't make the game any more fun. The scares are usually dissatisfying, and overall I feel more like I am playing the waiting game then anything else. I had some fun with the game considering I enjoyed the idea and seeing some horror movie influences within each level was novel, but it gets old fast. Wouldn't recommend it to most people.
Hands down one of my favorite RPGs of all time. The music and sound scape are two of the things about this game that really stand out to me, aside from the deeply involving storyline and cast of bizarre and interesting characters that is. I'm very much into sound design, I feel like it is an important aspect to any RPG as it helps draw you, the player, into the game just as much as a solid storyline and engaging graphics. Planescape excels at all of these and much more. Once I started playing this game, I couldn't stop until it was finished. Truly a masterpiece, I wish there was more like it.