Pariah definitely feels like a game made from the Unreal 2 engine. It has some interesting ideas, yet has tech. issues!
The game has many graphical and technical issues yet to be solved in a patch release.
The gameplay is fun, but may get boring after several plays. Therefore i class its replayablilty as 4/10.
The campaign is short, and lacks story power!
Basically, get it if you see it cheap!