You guys are forgetting that if NS:S was "free" you'd have to buy HL2, to download NS:S and play it. Now that NS:S cost $20 when it comes out, you don't need HL2(HL2 costs a lot more).
And HL2 in the year S.D. 741 will STILL cost more than NS:S will ever be.
Also, NS is dead now, but wait... just wait... IT WILL COME BACK ALIVE.
In the supar sekrat constellation forums in hte supar sekrat site, we're discussing methods of taking over the world.
Such as Natural Selection: Chess, featuring the dark aliens versus the light aliens. The gorge is the queen, hive is king, fade is the knight (Blink ftw), skulks are obviously pawns, and so on.
OR, the awesome Natural Selection Energy/Sports drink called "A-DRENALINE". The ad will be "Not just an energy drink, it's A-DRENALINE DRINK!". Or "This drink gives you the adrenaline upgrade in Natural Selection, so you'll never get tired!".
But don't tell anyone that I'm revealing top secret stuff to you guys.