Portal 2

Portal 2 continues the successful formula, combining innovative gameplay, an engaging story, and catchy music, which earned the first game over 70 awards. The Portal 2 single-player mode introduces new characters, unique puzzles, and a greater number of test chambers. Explore the unknown areas of the Aperture Science laboratories and reunite with GLaDOS, the malevolent artificial intelligence system that accompanied players in the first episode. The two-player cooperative mode of Portal 2 includes a standalone campaign with a unique storyline, new test chambers, and two new characters. This new mode will challenge your understanding of portals. You will have to cooperate, but most importantly, think cooperatively.