For the price you would normally get a single game, this is a steal.
Though portal wasn't very long, it was a fun distraction, and after you completed it you can go back for a more challenging go through on their modified levels.
I ended up mostly playing Team Fortress 2. It has provided many hours of online mayhem. It actually does justice to the original team fortress from so long ago, keeping the same 'on the edge of your seat' feeling.