Steam has Just Cause 2 on sale for just $3 (save 80% off) for the entire week. This is a great sandbox espionage game with hours of game play available.
Make sure to check the system requirements before purchasing. An important thing to know is that this game only supports Windows Vista, Windows 7 and later and requires a video card that supports DirectX 10.
Steam is a digital distribution service for PC games. All games on Steam are priced in US dollars and exclude tax. You will need to sign up for a free account if you do not already have one.