Portal 2 (2011) is a first person, puzzle solving video game that attempts to catch lightning in the bottle twice. Like Portal, it features Chell (our silent protagonist), a portal gun that create teleportation portals from point A to Point B, malevolent testing computers, deathly hazards, and a story. Unlike the original, it doesn't catch lightning in a bottle, but don't take that as a criticism. Valve took what worked in the first game, added more puzzles and narrative, kept the wickedly evil sense of humor, and generally gave you more game for your buck. For me, this took the game past that sweet spot of the first game, creating an experience which pulled me to the end rather than slamming me into the end with so much energy that I wanted more.
With more game play, Valve gave us more acts and more mechanics. The first act of the game lasted about as long as the original, with enough puzzles and plot after that to total 2 to 2.5 more game than the original. If you like puzzling, getting this game for cheap is worth your money. New mechanics include flingers, light bridges, light tubes, and various goos.
Towards the end, the puzzles trended harder than anything in the original, with solutions that approached so crazy that they just might work. Rarely did I run into puzzles that made me scream, even if I did die a lot.
I must admit that the ending was madness. It didn't give me the utter satisfaction that the original ending gave me, but I found it frightfully clever and satisfying.
I had no crashes during any play session.
At no point was the world at risk in this game.
I got both game bundled, on sale, which proved an amazing value.