User blog comment:Bovell/Opinion: We don't want Black Ops 2/@comment-4050621-20120218004123/@comment-4478081-20120218030837

Valve added the different gels and heaps of cleverly designed, innovative test chambers to incorporate them. The storyline was brilliant, too. The concept doesn't have to change for a game to be innovative. Also, Spiderman 2 and SWBF II.