Remember in SWAT how we couldn't really use CS gas in a TDM because it doesn't effect the other team? Well no more baby! I tried out the RvS demo and it rocks like I never imagined! If you don't bring a gas mask and you go near CS, your screen gets all blury and you can't see straight! You also slow down. I assume the effects are just as sever for flashbangs, but I haven't gotten hit by one yet. This game isn't even the final version and it is still the BEST game I have ever played!
Also, another cool thing was opening doors... You don't just hit a button, you have to wheel up and down with your mouse! You can open it just a crack or all the way, it's up to you and how much you turn the mouse wheel!