Jonathan Howard Langley, Games Programming student at the University of Huddersfield, Yorkshire, England.
Excellent. Does a magnificent job of enhancing an already entertaining game.
Ono of the most compelling puzzle games I've ever played! Truly brilliant!
Valve has outdone themselves once more!
A brilliant engine, capable - with effort - of producing some very top quality stuff. Well worth the investment of both time and money. In spite of the negative feedback it gets.