Steam has Strike Suit Zero on sale for 50% off. You can grab this game for just $9.99 until May 27th.
Steam has Sins of a Solar Empire: Rebellion on sale for 66% as part of their mid-week madness sale.
Amazon has the Bioshock Dual Pack for just $4.99 which contains Bioshock and Bioshock 2. These are Steam keys.
The Zombies Vs. Aliens Stellar Bundle of Indie PC Games is going on where you can grab several games for just $1. This bundle is to support indie devs and also helps the SpecialEffect charity.
Just $1 gets you Steam keys for:
- Zombie Shooter
- Zombie Shooter 2
- Alien Shooter Revisited
- Alien Hallway
Get the bundle here - http://www.bundlestars.com/deals/zombies-aliens-indie-stellar-bundle/
Amazon has Grand Theft Auto IV: Complete for just $14.99. This is a code that is redeemed on Steam.
Steam has Elemental: Fallen Enchantress on sale today for 66% off. You can grab this for just $10.19 today.
Amazon has the PC download for Tomb Raider on sale for $34.99. This is redeemable on Steam.
Steam has Farming Simulator 2013 for 50% off this weekend. You can grab this popular game for just $13.99.