Steam has a free weekend play of Company of Heroes 2, and it is also on sale for 66% off. The Collector’s Edition and various DLC are also on sale.
Steam has Saints Row IV as part of their mid-week madness sale. You can grab it for the next few days for 66% off. Various DLC is also on sale.
Steam has a sale on Kalypso strategy titles this weekend with most up to 75% off. You can also grab the Kalypso Strategy Pack with a bunch of games and DLC for just $49.99. You can see the entire sale here. Kalypso Steam Sale
Steam has Grand Theft Auto IV: Complete Edition for just $7.49 this weekend. Other GTA games are also on sale, along with other Rockstar games. Amazon has also matched the sale if you prefer to purchase there....
Steam has a Ubisoft sale going on this weekend with titles up to 75% off. There are also new deals daily until February 24th. Ubisoft Weekend Sale
Steam has Wargame: Airland Battle for 70% off as their mid-week sale. You can grab this for just $11.99 and you can also pick up the franchise pack which is also on sale.
Steam has the Splinter Cell franchise on sale this weekend for as much as 75% off, including games and DLC. Splinter Cell Steam Sale
Steam has The Bureau: XCOM Declassified for 75% off during their weekend sale. You can grab this for just $12.49.