Portal

Originally a throwaway game included in the compilation package The Orange Box (featuring Half-Life 2, two expansion packs for it, and Team Fortress 2), Portal was the breakout hit of 2007. Not content with raking in critical acclaim in the form of multiple awards—including Game of the Year and Best Game Design from the Game Developers Choice Awards—it also gathered mass popular appeal in the form of internet memes, official merchandise and fan-made crafts. The source of all this acclaim? A simple, yet ingenious design, an engaging premise, a darkly funny script, and what is quite probably the best song ever played over ending credits.

You play as Chell, a young woman who wakes from stasis in the Aperture Science Enrichment Center and is instructed to test the Handheld Portal Device, a gun that shoots controlled wormholes to connect two points in space. Instructions are given via the AI, GLaDOS, a calm female voice that promises cake as it leads you through rooms filled with jets of fire, oddly polite gun turrets, and other hazards. After a point you start finding out what's behind the scenes and things only get darker—and funnier—from there.

Images:

Chell, chasing herself through walls
Your best friend in the place, the Weighted Companion Cube
Carrying a turret around, so it won't shoot
M. C. Escher would love this
GLaDOS, herself
Game trailer

Final Fantasy VIII

1999 marked an effort of realism with FFVIII. Character models had realistic proportions, real actors were recorded to make motions look realistic, the settings made an effort to look realistic... sadly, however, this game was widely panned by new fans for not being FFVII-2 and by old fans for lacking the fantasy aspect they loved. Sorceresses, magic, mysterious links to past events, and guardian forces aside, this is also a game with monsters falling from the moon, an orbiting satellite prison, flying anti-gravity buildings, a zero-G rescue mission, and your very own spaceship. If you really look, you can even find an alien. This is very much a love it or hate it game. The ones who love it really, really love it and the ones who hate it would rather poke out their eyes with a fork than play it. Middle ground is rare with this one, so it must be doing something right.

Squall Leonhart is taciturn and withdrawn. He's also one of the very few masters of his chosen weapon—the gunblade—at his school, a military academy that trains the students for the chance to join an elite mercenary force called SeeD. With the help of his instructor, Quistis, Squall qualifies for the SeeD exam, along with his rival, Seifer, and fellow students Zell and Selphie. Following his sterling performance he is accepted into the ranks of SeeD, and at the celebratory ball he is knocked off his feet by a young woman completely unlike any he's met before. Little does he know that she—Rinoa—is going to embroil him in a massive affair of global politics, power-hungry sorceresses past, present, and future, Squall's unknown parentage, and, most difficult of all, his own walled-up emotions. And that's all before spacetime starts breaking apart.

Images:

Squall
Seifer
Quistis
Rinoa
Zell
Selphie
Irvine
Sorceress Edea
Game into movie
Ballroom dance movie

Final Fantasy VII

The first FF on the Playstation. The first FF released for PCs. The first FF to feature 3D graphics and fully animated movie clips. Quite probably the best-selling Final Fantasy game ever made. 1997's release of Final Fantasy VII brought the series to vast numbers of people who had never before played it on the Nintendo consoles, and made more die-hard fanatics than any FF before or since. While not the only game in the series to have a related game (X has a direct sequel, and XII has a sequel in production), VII has three spin-off games, two films, and two novellas based on it. It catapulted the silver-haired prettyboy phenomenon into rabid popularity, is prone to some truly terrible translation gaffes, and has caused innumerable other works to suffer by comparison. It features the most popular incarnation of Cid—and the only one that's a main, playable character—the most popular villain, and one of the most popular main characters of any game. Love it or hate it, Final Fantasy VII is a powerful force in the game world, and will remain so for some time.

Shinra Power is a monolithic corporation with direct control over the city-state of Midgar, and indirect control over the majority of the world. Mako is the concentrated lifeforce of the planet, and the energy source mined and distributed by Shinra. SOLDIERs are the elite of Shinra's army, created by saturating ordinary people with high concentrations of mako and keeping the ones that survive the process. Cloud Strife is a SOLDIER-turned-mercenary with massive gaps in his memory who joins an eco-terrorist group called AVALANCHE—headed by Barret Wallace—at the request of his childhood friend, Tifa. After planting a bomb that destroys one of the eight mako reactors in Midgar, Cloud meets Aerith (mistranslated in the game as Aeris), an innocent young woman being pursued by the Turks, Shinra's enforcers. Finding out why Shinra wants her is only the beginning, as it seems that Sephiroth—Shinra's leading general, most accomplished SOLDIER, and presumed corpse for the last five years—is alive, insane, and more powerful than ever.

Images:

Cloud
Tifa
Barret
Aerith
Cid
The famous Sephiroth scene
Cloud and Sephiroth on the poster for the movie Advent Children
Sephiroth as seen in Crisis Core
Rufus Shinra and the Turks: Elena, Tseng, Rude, and Reno
Rude and Reno as they appear in Advent Children
Vincent Valentine in Dirge of Cerberus
The original game intro compared to the tech demo remake for the PS3
Eminence Symphony Orchestra performing Sephiroth's theme song