First deal: Nvidia is giving away Beta copies of Orcs Must Die!
http://www.geforce.com/geforce-orcs-must-die-beta-key-give-a…
No more keys.
Deal Number two:
It's one of those weird bundle deals where you actually pay MORE by purchasing in a bundle, so buy each title seperately.
This deal expires in 4 hours!
$9.98 Shadow of Chernobyl — Highly recommended!
$2.49 Clear Sky — Not so recommended.
$6.48 S:COP Loyalty Edition, highly recommended with Shadow of Chern (requires one of the above two games installed to play)
Warning: These games are DRM'ed and will install Starforce / Tages. These are not Steam keys.
If you like Metro 2033/ LL then you will absolutely enjoy the Stalker series (same universe). Think of Morrowind but with guns in a apocalyptic Russia. The games are also fully moddable and there is a huge modding community behind them.
Just commenting to say that this game will be free to play when it launches.