I've never had any issues with Steam (in fact, I love being able to pay for and download games, and never having to worry about CD protection, or needing to put a CD in the drive to play a game), and I used to play a lot of Red Orchestra. For WW2 infantry gaming, I'd say it's the best out there. No crosshairs, only iron sights. No bunny hopping. No ridiculous amounts of life, no health meter... if you get shot, you'll probably die. On their forums, the devs seem pretty dedicated to historical accuracy.
Give it a shot.