As you know Prey introduced us the 'portal' gameplay concept, and now Valve is 'taking' that concept and creating a whole new game based on it, with some cool improvements.
Portal is a kind of puzzle action game built under the Source engine that will permit us to use portals to solve the numerous complex levels that we will have to complete. The new thing here is that we will be able to create these portals 'on the fly' with a 'Portal gun' and we can create them on any wall, floor or ceiling to be able to reach our objective. If that sounds too simple, keep in mind that there are numerous challenge levels, where we have to think and, at the same time, keep the fast-paced gamestyle of the game (which include turrets, traps, moving walls, etc), while other levels will require us to manipulate objects through portals and move them around to be able to achieve our objective.
Well, to resume it, if you haven't seen it already, check the Portal trailer here, and give your oppinion. (If you only watch the first 24 seconds, you will get the wrong idea of the game














