One of my most favourite games of all time! This is an instant favorite of mine from all the Valve titles, it's hard for me to do this brilliant game justice with a simple review, but oh my this game was fantastic, I was a bit late to play it, like I am with many Valve games. If your interested in a swell, and challenging puzzle game with memorable characters, amazing and pleasent design, along with fun gameplay, I advocate you to go pick it up and give it a play, and recommend it to any of your friends!