OK, did you play Half Life 2?
If you did, it would make justice to say that "it's a compilation of old games"
But, if you didn't, dude, what can I say...
A recap
Half Life 2 is STILL the best FPS out there and the Orange Box version pawns the vast majority of the so called "next gen" FPS titles (Blacksite, Jericho, Timeshift, Resistance etc etc etc) graphics wise. Cause gameplay and story wise, it is a million light years ahead. Play it if you didn't.
Episode 1. A descent 4-5 hour (or 8 hour if you hunt down the achievements) expansion pack. Just in the whereabouts of City 17.
Episode 2. A great expansion pack with really next gen visuals from an old gen engine. Now, that's impressive! 7-8 hours of the best quality FPS experience. And it's new content.
Team Fortress 2: Still, one of the funniest and most enjoyable multis out there. And it's new too.
Portal: 3-4 hours of pure fun. And if you mess with the medals and the achievements...The cake is a lie, the cake is a lie, the cake is a lie, the cake is a lie...
Do yourself a favor, and buy this game....