The game Portal, was seen advertised in billboards inside counter-strike 1.6 was a game with a new concept of linking two places together which caught people's interest really fast. When Valve decided to release Portal 2 they added a whole lot of new features to the puzzle game. The main addition being the co-op mode which brought in much challenging levels. Moreover, Portal 2 has an unbelievable amount of object interaction and map accessibility which makes the game more fun and realistic. The game requirements are very low in terms of hardware and software but does involve brainware, making it possible for anyone to try. Portal games are definitely worth playing and Portal 2, I assure, is justice to the portal franchise as a sequel. It is an amazing game given the theme it is based upon.