Hmm...

Dragon Age II
Mass Effect 2
Mass Effect 3
Dragon Age: Inquisition
Mass Effect 1
Dragon Age: Origins

I played the Mass Effect series first, before moving on to Dragon Age: Mr. Carny introduced me to them and they are easily one of my favorite game series. You may be surprised to see Dragon Age II at the top of the list but what can I say? Sarcastic FemHawke is just killer.