Relic’s 2013 World War II RTS is now free for a limited time on the Humble Store. Like always, go to the store page here, login, add to your cart and then immediately claim it the Steam key which will be emailed to you quick.
The original Company Of Heroes was highly regarded, the sequel focuses on the Eastern front for its campaign. The big difference of the series compared to other RTS is it is smaller scale, focusing on tactics. There is a cover system with destructible environments.
Humble has been constantly offering free games throughout this year. If you have been following the free game alerts so far you should have a sizeable Steam account by now.