Portal is a comedy puzzle game. A pretty black comedy, granted, but firmly a comedy. Most of the jokes revolve around you being lied to, killed, or thirsty to the point of delirium, but that won’t stop you chuckling at least once per puzzle. In fact, that’s usually the reason for it.
The puzzle part you’re hopefully familiar with from thetrailerbetter yet, the 2005 prototypeNarbacular Drop. You’ve got a gun that opens rifts in any wall you shoot it at, and once you’ve opened two, you can walk through one and come out the other. You’re evidently a lab rat in an “Enrichment Center” specifically designed to test your ability to use this device to navigate an absurdly hazardous obstacle course, led along by a lilting, broken-sounding synthetic female voice that rings out from tinny speakers.