Portal is an excellent puzzle game, with an unique game mechanic, an excellent story, and, overall, a great atmosphere. Exploring the test chambers of the mysterious Aperture Laboratories, while being constantly watched by GLaDOS, creates an atmosphere of suspense like no other. Only questions arise at each chamber, and with each of GLaDOS' comments.

The story is really good, and filled with dark themes and humour. This game's popularity (and its sequel) should speak for how good the game is, so it's kind of hard for me to describe it.

Just get it.

Portal is an excellent puzzle game, with an unique game mechanic, an excellent story, and, overall, a great atmosphere. Exploring the test chambers of the mysterious Aperture Laboratories, while being constantly watched by GLaDOS, creates an atmosphere of suspense like no other. Only questions arise at each chamber, and with each of GLaDOS' comments. The story is really good, and filled with dark themes and humour. This game's popularity (and its sequel) should speak for how good the game is, so it's kind of hard for me to describe it. Just get it.