A very creepy but incredibly addicting until the end of the game. Makes you want to keep playing forever
The only problem, if there was one, was the length of the main story line. I felt that the maps could have gotten much more intricate to make the main game last longer. Yet, once the main game was finished, the challenge maps allowed for continued game play for many more hours of teleporting fun.
Also, another suggestion to future players, put the difficulty to at least hard because some maps may seem to easy on low difficulty but allow no room for error on much higher levels.
GLaDOS made this game for me. The creepy voice coming on the intercom every so often constantly freaked you out as you tried to go through the puzzles. Also the memorable phrases from this game have stuck with me since I played it.
"THE CAKE IS A LIE!"