Yes this is a one shot kill game. If you take a round to the torso and head you will die, currently the mod has a damage system that wounds you for shots in arm and legs, so 2 shots in arm/legs = kill. This wounding system may change for the retail version.
This is not a DODS style game the only similarity between the 2 is they are based on ww2. RO requires a bit more thought than run and gun which doesnt appeal to every1.
Also I find the maps on DODS a bit small RO's are much larger which lends itsself to flanking etc.
I'm not knocking DODS its fun for the arcade/run & gun type of play.
EDIT: Forgot to mention that both mod and retail game have bot support. Mod bots are basic and not very bright, not sure what AI improvements the bots have in retail but they can now drive vehicles, throw nades etc. They are usefull for offline/practice play.