Portal 2 2011

Released: April 18, 2011
Anniversary: Turned 15 on April 18
Genres: Platform · Puzzle · Adventure
Platforms: PlayStation 3 · Linux · PC · Mac · Xbox 360 · Nintendo Switch
Developer: Valve
More info: Wikipedia IGDB

Where to buy

Digital: Steam Xbox
In a collection: Valve Complete Pack

Steam

Portal: Companion Collection

Nintendo
Physical: Search on Amazon

Affiliate links: GOG, Fanatical, Green Man Gaming, ININ Games and Amazon

Is it still worth playing?

Valve's 2011 first person puzzle game for Windows, macOS, the PlayStation 3 and the Xbox 360, set in the Aperture Science Enrichment Center, which the supercomputer GLaDOS has rebuilt. You play Chell, a test subject. Puzzles are solved by placing portals, together with lasers, excursion funnels, hard light bridges, aerial faith plates and three gels: Propulsion, Repulsion and Conversion. A separate co-op campaign has two robots, Atlas and P-Body, who share four portals and use voice chat, pings and gestures. Each campaign takes about six hours. A few simple tools that combine keep producing new puzzles, and the writing and characters carry them, so it still plays well today.