Collider argues that Valve’s 2011 puzzle game Portal 2 remains an exceptional science-fiction video game, praising its physics-based portal mechanics, environmental storytelling and sharply written dialogue. The article presents the sequel as a lasting landmark of the 2010s, suggesting its combination of gameplay and narrative has rarely been matched.

Portal 2 follows Chell decades after the first game, as she wakes in the decayed Aperture Science facility and attempts to escape with the AI core Wheatley. Their actions revive GLaDOS, leading Chell through increasingly dangerous test chambers before Wheatley seizes control; Chell then reluctantly allies with GLaDOS, now reduced to a potato battery, to stop him and ultimately reach the outside world.