The best investment in history!
For the remember - the greatest FPP shooter in history have been released with two add-ons (Episodes 1&2) with awesome logic game called Portal and with kick_your_mind multiplayer shooter Team Fortress 2.
Half Life 2 and its Episodes: intriguing plot, great graphic and cool soundtrack. In these three words you have everything you have to know. And in my next word you will be known everything about this game: BUY IT :)
Portal is a logic game in which you must travel to a core of mysterious industrial place. You will be armored in "Aperture Science Handheld Portal Device" - gun making holes on walls, grounds and anything else by which you can teleport to another hole. It's sounds weird but your labyrinth will be blown up :)
Team Fortress is not-another-one-multi-shooter. It's the one and the only multi shooter with crazy mechanics of gameplay and comic-graphic. Owh, just see gallery from this title, marvelous :)
Great, great and once again: great Box! Orange Box!