Best Game on steam for 20 dollars?

What game do you highly suggest thats 20 dollars or less?

Defense Grid, Shattered Horizon, Serious Sam HD: Second Encounter, Lead and Gold, Torchlight, Trine, Zeno Clash or Shatter. You can select one, I don't know which genres you like.

CSS

Penumbra complete collection $20.00. Worth every penny.

Peggle Deluxe/ Peggle Nights.

counterstrike source! only!

Stalker Call of Pripyat.............wait i have teh loyalty thing that makes it $20, nvm

um........Team Fortress 2

Stalker Call of Pripyat.............wait i have teh loyalty thing that makes it $20, nvm

um........Team Fortress 2

lordreaven

[QUOTE="lordreaven"]

Stalker Call of Pripyat.............wait i have teh loyalty thing that makes it $20, nvm

um........Team Fortress 2

iPutty

What about the Quantum Field Theory?

What game do you highly suggest thats 20 dollars or less?

SimplyFatal

Have you seen the game, Shattered Horizon?

Team Fortress2

Stalker (any of them)

KOTOR

Riddick

Tropico3 (it was one sale a few times)

The Witcher