Portal 2 — The Puzzle Game That Makes You Feel Clever, Then Immediately Takes the Credit Away
Today's pick: Portal 2 (Valve, 2011). Metacritic 95/100 across all platforms, Overwhelmingly Positive on Steam, BAFTA Best Game 2012, Golden Joystick Ultimate GOTY. This guide covers how the portal gun, gels, funnels, and light bridges combine into puzzle chambers designed to make you feel smart; what players love and where the game genuinely divides opinion (too easy vs. original, second-act navigation, the gel mechanics); and a spoiler-free setup for Chell, Wheatley, GLaDOS, and the decayed Aperture Science facility they're all stuck inside.
Valve | 2011 | First-Person Puzzle | PC / PS3 / Xbox 360 / Nintendo Switch
| Metacritic | 95/100 (PC, PS3, Xbox 360) — Universal Acclaim 1 |
| Steam rating | Overwhelmingly Positive (was the highest-rated game on Steam for years) 2 |
| Notable awards | BAFTA Best Game + Best Story + Best Design (2012); Spike VGA Best PC Game; GDC Best Narrative, Best Audio, Best Game Design; Golden Joystick Ultimate GOTY 2011 3 |
| Platforms | PC, PS3, Xbox 360, Nintendo Switch (Portal: Companion Collection, 2022) |
| Length | ~6–9 hours (single-player); a separate co-op campaign of similar length |
After nine issues covering action RPGs, roguelikes, Metroidvanias, CRPGs, open-world Westerns, and precision platformers — here's today's pick: a game with no combat, no build variety, and no character stats. Portal 2 is a puzzle game. It asks one question over and over: can you figure out where to put the holes?
How it plays
The core tool is the portal gun: a device that creates two linked openings on flat, portal-receptive surfaces. Step into the blue oval, emerge from the orange one. That's it. That's the mechanic — and Valve spent four years building increasingly devious rooms around it. 4
What makes Portal 2 distinct from the original is the new toolset introduced around the portal gun. The game adds Excursion Funnels — slow-moving tractor beams that can be redirected through portals — Hard Light Bridges that block movement or redirect lasers, Thermal Discouragement Beams (lasers), and Aerial Faith Plates that launch you airborne. The most inventive addition is the trio of gels: blue Repulsion Gel makes surfaces bouncy, orange Propulsion Gel makes them frictionless and fast, and white Conversion Gel lets you place portals on surfaces that normally reject them. 3
The puzzle design works in two stages. First, Valve shows you a new mechanic in isolation — a "checklist" room where you can experiment safely. Then it combines elements in ways you didn't expect. The signature moment every player has at least once: staring at a room for ten minutes, convinced you're missing something, then noticing a single floor tile you can paint with Conversion Gel — and everything clicks. Lead writer Erik Wolpaw described Valve's goal for each puzzle as making players "feel really smart when they solve it," not maximally challenged. 3
There's also a full co-op campaign, where two players each have a portal gun and four portal slots between them. These puzzles require genuine coordination — you cannot solo them by exploiting one player's portals — and they're noticeably harder than the single-player chambers. Most players find the co-op campaign takes as long as the solo story. 4
コンテンツカードを読み込んでいます…
What players are saying
Portal 2's critical reception is about as close to unanimous as a game gets. Eurogamer's Oli Welsh gave it 10/10 and wrote, "Portal is perfect. Portal 2 is not. It's something better than that." IGN called it 9.5/10, noting Wheatley's "obvious enthusiasm for the role benefits the game." GameSpot gave it 9.0/10 and praised the co-op as one of the best multiplayer designs in Valve's catalog. 1 3
The most consistent praise lands on three things: the writing, the voice acting, and the puzzle structure's learning curve. The game has 13,000 lines of dialogue. Stephen Merchant voices Wheatley — a round, cheerfully incompetent AI personality sphere — with improvised riffs that Valve's writers built the middle act around. J.K. Simmons voices Cave Johnson, the deceased eccentric founder of Aperture Science, through a series of archived audio recordings. The combination gives the game a comedic register that almost no other puzzle game attempts. 3
The player criticisms are real, though. The most persistent: Portal 2 is easier than the original. Ars Technica's Peter Bright argued that many levels "serve primarily as tutorials for new mechanics," leaving him with the feeling "the game was on rails." The second act, where puzzle rooms give way to large, maze-like industrial sections, confused multiple reviewers who had no idea where they were supposed to go. PC Gamer's Dan Stapleton was less impressed by the gels than the other mechanics, calling them "difficult to control" and noting they "have only a couple of uses at most." 3
At launch, there was also a user backlash on Metacritic — complaints about length (some users claimed four hours, though Kotaku's Stephen Totilo counted nine), paid cosmetic DLC at release, and the perception that the PC version was a console port. Those complaints quieted over time; Portal 2 currently sits at "Overwhelmingly Positive" on Steam after 454,000+ reviews. 2
The honest summary: some puzzle fans find the difficulty calibration too forgiving, particularly players who found the original Portal tighter and more elegant. If you want a game that will genuinely stump you for hours, Portal 2 might not be that. If you want a game that makes you feel smart at a steady pace while telling one of the funniest stories in the medium, it's one of the best ever made.
Story setup (no spoilers)
You are Chell. You were a test subject at Aperture Science Enrichment Center — a massive underground research facility that went badly wrong when its governing AI, GLaDOS, killed everyone in the building. You destroyed GLaDOS. You escaped. Then you were dragged back inside.
Portal 2 opens an unspecified time later — maybe decades, maybe longer — with Chell waking up in a ruined motel room inside the facility. The building has aged into decay: mossy concrete, collapsed ceilings, nature slowly reclaiming the white test chambers. A small, spherical personality core named Wheatley talks her through the first steps: find the portal gun, get out.
It does not go according to plan.
The game's story unfolds in three distinct layers: the puzzle-filled present, a comedic running commentary from Wheatley and GLaDOS, and a set of archived audio recordings from Cave Johnson — the Aperture Science founder — that trace the facility's history from 1950s ambition to eventual disaster. The recordings function as both worldbuilding and dark comedy, and many players find them the game's best writing. None of this requires familiarity with the original Portal, though that game is only a few hours long and free on some platforms periodically. 3
Should you play it?
Yes, if: You want a puzzle game that respects your intelligence without punishing you for not seeing solutions instantly. You want funny — genuinely funny, not "video game funny." You've heard about GLaDOS and Wheatley for years and want to finally see what the fuss is about. You have a friend who wants to do the co-op campaign with you.
Maybe not if: You bounced hard off the original Portal because puzzle games aren't your thing. You're looking for a game that will seriously challenge you — some experienced puzzle players find it too well-tutorialized. You object to paying for a ~7-hour experience (though Portal 2 regularly goes on sale for under $5 on Steam).
Available on PC, PS3, Xbox 360, and Nintendo Switch (as part of the Portal: Companion Collection). 6
このコンテンツについて、さらに観点や背景を補足しましょう。