Portal 2 was a first-person-shooting game, a type of game short versioned as FPS among players. Such games normally require players to aim at things with guns or other weapons for kill or fight from a first-person standpoint. And Portal 2 has perfectly followed this rule and had not provided the player a single chance to view upon his or her own appearance, except for using some tactic ways.

Anyway, although it is categorized as FPS, the game never required the player to shoot concrete bullets against his or her enemy. Rather, the gun the protagonist uses shoot special “signal” to create teleport portal holes for things to pass. This idea is probably one of the most innovative attempts upon the traditional First-person-shooting games.

But if the specialty of the game ends there, it would not be recorded as one of the greatest game at the time. A perfect combination of plot, game style, visual technique and music appealment are the true secrets for its success.

The story continues from Portal 1, where the protagonist Chell has turned off the central AI of Aperture, GlaDOS. Like the original Portal, players solve puzzles by placing portals and teleporting between them. Portal 2 adds features including tractor beams, lasers, light bridges, and three types of gels that alter player movement or allow portals to be placed on any surface. In the single-player campaign, players control Chell, who navigates the dilapidated Aperture Science Enrichment Center during its reconstruction by the supercomputer GLaDOS. New characters include robot Wheatley and Aperture founder Cave Johnson also plays a big role for the progress of the story arc. In the cooperative mode, players solve puzzles together as robots Atlas and P-Body.

In general, the game inspires creativity, and is a great combination of both adventure and puzzle solving. Anyone interested in it can buy it on steam with $9.99 (sometimes discounted to $1). I will give a 4.5 star out of 5 for the game, with 0.5 points off due to its linear storyline.