One thing many of you are neglecting to realize is, Portal is PART of the Half-Life universe. It is not unlike Opposing Force or Blue Shift. So saying "which is better, TF2, Portal, or HL2" is not entirely fair. It should be "TF2 or everything else in the box". That said, considering the quality of "everything else", one has to go with Half-Life 2, Ep1, Ep2, and Portal. Team Fortress 2 is, undeniably, the best multiplayer game of the year. I've seen die-hard Halo fanboys sneaking really long play sessions of TF2 like they were looking at a porn magazine in a closet and trying to deny it later. Half-Life 2 and it's ilk, on the other hand, are down-right the best single-player games of this year, and indeed, ranked in the highest tier of the best games of all time. In short, as a gamer, you owe it to yourself to get the Orange Box.