Portal 2 (2011)

There are few series as imaginative as Portal when it comes to storytelling. The first game weaves a short tale with puzzles and comedy, but the second stretches into a longer masterpiece that holds even more value. Back again in the shoes of test subject Chell, you're met by the eccentric Wheatley several years in the future, when the Aperture Science facility is all but abandoned. Waking the evil AI GLaDOS, you're in a constant struggle to survive her test chambers and escape from the laboratories. Of course, all of it is powered by the Aperture Science gun, which lets players traverse the map by placing two linked portals. The layer of complexity adds to the story rather than taking away from it, imbued with pieces of humor and rewarded with dialogue when you're successful. Through it, you will form bonds with inanimate objects, chuckle at its dark comedy, and appreciate every bit of humanity in the cold environment.