I bought Valve's Orange box on Saturday, downloaded off Steam. The Orange box contains: Half Life 2 Episode 2, Portal, Team Fortress 2, Half Life 2 and Half Life 2 Episode 1 and a version of Peggle. I already have HL2 and Episode 1 but apparently I can give the new copies away as gifts, which is a nice touch.
I have only played Portal so far. I finished it on Saturday, probably about five hours of gaming all in. Portal has got rave reviews and it is certainly an interesting puzzle game but personally I wouldn't hail it as as the future of gaming. It seems to me that jumping over obstacle courses in generic indoor maps with muddy brown toxic waste down below is very old school 1990s type game play even with the added twist of hyper dimensional portals. Nevertheless I enjoyed the few hours and the game is humorous enough. Judging by the rave reviews that portal got I am probably the only person on the planet who preferred Prey even though Prey had some serious faults.
It may be that some of my dissatisfaction with Portal comes from the fact that I got a headache from playing. FPS games haven't given me headaches since the bad old daya of the mid 1990's with low resolution low framerate monstrosities. Perhaps the gravity defying vertigo inducing portals themselves contributed to my sore head.