This dynamic music was also designed as a reward for successfully completing puzzles inside the game. In the music department it won the “2012 Outstanding Achievement in Original Music Composition” by the Academy of Interactive Arts and Sciences and “Best Game Music of 2011” by Kotaku.Ī unique characteristic of Portal 2′s soundtrack, apart from its sonic grandness, is that it’s generated in real time by an adaptive music system that react to the player’s actions. One of the best-selling video game of 2011, Portal 2 by Valve Software is one year old today. Praised by the critics, it received load of awards.