IF nowhere in the game's case/manual (or website) refers to a Online requirement DRM you should be able to get the game refunded.
I can't blame devs trying to protect their game, but they are way going over their heads with DRM's that asks too much of the paying customer.
I don't like DRM's that install something I don't know of in the background or DRM's that require to be online all the time as I dont' want anything else to decide WHEN I can play my purchased product simple as that.
@Skybird: You still haven't considered getting DCS:Black Shark? for the little hassle of activating and deactivating throught SF which doesn't install anydrivers it's completly worth it. and soon they'll be releasing DCS: Warthog (A-10) that's now 2 knives stabbed in your back
*runs*
HunterICX