Buy?!? What?

I'm never purchasing for games, because there are some great games hidden in the world of Internet.
... Okay, I can admit that if it is great game, and has great replay value,
then I might purchase it.
And I can admit that trailer looks great, though I am immune to (most) commercials.
If I can get my hands for free trial version, then I could test it. Trailers shows promises, but not the truth. This should be remembered when you buy new game.
(But I think most would torrent game

)
Hm...Natural Selection? Isn't that some clone of Trem?
For what I remember, it was long before first Natural Selection came. But it was long time ago, can't remember specifics of the history of Trem.