Portal which was originally released as a small part of the orange box which consisted of massively popular game half life and team fortress along with portal. Portal became massively popular and got many game of the year awards. Valve decided to make a stand alone game portal 2. This continues the first part story and in the mean time this game fills the questions like what is this place? how did our character end up in the aperture science laboratory? What does this laboratory do?. This game takes place in the destructed atmosphere which was created by destructing GlaDos in the end of first part. i didn't like solving the puzzles in a rusted atmosphere .compared to portal 1 there were far more puzzles in this game. The developers done a great job showing the Hugeness of the place when you play some levels outside the testing chambers. The story is awesome. For those who dont want to play all the game here is the short version. In the first half you help and be helped by a computer core called wheatley which tries to get you out of the facility but as you help him get control over all the facility he will turn evil and Glados(she was woken up by some stupidity by wheatley) will be strapped to a potato battery. In the second part you will get to glados and take her to wheatley and you both destroy wheatley and you will be set free. The dailouges in the game are hilarious especially of wheatley-the computer core. Overall it was a fun experience although the levels were a cake walk once you understand the physics. The last level of the seventh chapter was the only challenging one and i had to use some help to get it right. The ending was extra-ordinary& I recommend you to download the credits song both 1& 2 that was also awesome. Watch it yourself.....
....... As always have fun gaming.